A．tell someone to go away because you don't want to talkB．tell someone to start asking a questionC．选项4

You must take away the clothes from the heat of the fire, ________ they might get burnt.

We know much about the universe. It means the earth, the sun, the moon and the stars, and the space __21__ them.
Most of the stars are much bigger than the moon, but they look smaller __22__ they are far away from the earth. At night, the moon is high in the sky like a light. But the moon has no light of its own . The light of the moon __23__ the sun. The sun gives us light, heat and life. And the plants, animals and men will die without the sun. The earth is going round itself __24__. When the part of the earth turns to the sun, it is day. The __25__ part of the earth is night.
The earth is our homeland. We should love it.
21)、
A.because
B.comes from
C.between
D.opposite
E.all the time
22)、
A.because
B.comes from
C.between
D.opposite
E.all the time
23)、
A.because
B.comes from
C.between
D.opposite
E.all the time
24)、
A.because
B.comes from
C.between
D.opposite
E.all the time
25)、
A.because
B.comes from
C.between
D.opposite
E.all the time

Tobacco was unknown （) Europeans long ago. It （) in America, and Christopher Columbus fo
Tobacco was unknown () Europeans long ago. It () in America, and Christopher Columbus found it (). Later, he returned to Europe and told everyone about tobacco. He said that the American Indians often () it.
One way of smoking was like this. The American Indians would throw some tobacco leaves () a fire. Then they put long tubes in their mouths. The other () of the tubes were extended over the fire, so they were able to () the smoke into their mouths.
About the year 1560 a Frenchman, Jean Nicot, was living in Lisbon, Portugal. He was very interested in all American (); some of them were very different () the plants of Europe. He tried to use the leaves of the tobacco plant to () pain. Perhaps a man had a(n) () pain in a leg or an arm. Nicot put tobacco leaves on the painful place, and tried to cure the pain in that (). We say now that tobacco () nicotine. The word nicotine () this man's name.
() was used as a cure in many ways. Sometimes a horse was so ill () it could not walk properly. Then a man () some tobacco smoke () the horse's nose. He believed that this made the horse ()! Poor horse! Nobody blows smoke () horses now.
1、A) for B) to C) in D) by
2、A) grew B) planted C) was D) existed
3、A) here B) there C) here and there D) in person
4、A) used B) smoked C) buried D) smelt
5、A) on B) into C) under D) by
6、A) points B) parts C) ends D) branch
7、A) let B) pull C) make D) draw
8、A) plants B) leaves C) flowers D) trees
9、A) than B) from C) to D) between
10、A) cure B) kill C) cause D) operate
11、A) serious B) very C) worse D) acute
12、A) way B) method C) approach D) means
13、A) contains B) possesses C) has D) is full of
14、A) becomes B) comes after C) is derived from D) is named after
15、A) The leaves B) Tobacco C) Smoke D) Fire
16、A) that B) so that C) for D) as
17、A) would place B) would blow C) would put D) would smoke
18、A) into B) out of C) over D) onto
19、A) healthier B) stronger C) better D) weaker
20、A) at B) into C) to D) for

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Yo/△接线变压器的差动保护为什么对Yo侧绕组单相短路不灵敏？如何解决？

内部信号计数器是对PLC的软元件等触点周期性动作进行计数,例如、YO由OFF→ON变化时,计数器计数一次,当YO再由ON→OFF变化时又计数一次（）

以下FX2N可编程序控制器程序实现是YO接通2s的功能（）

电压互感器采用Yo/Yo形接线方式，所测量的电压为()。

找出下列注音正确的一项（）

Over two thousand years ago Rome（罗马)was the center of a huge empire. The Romans nee
Over two thousand years ago Rome(罗马)was the center of a huge empire. The Romans needed a way to move their large armies quickly so that they could protect their huge country. They needed land trade routes, so they joined all parts of their empire by a net-work of roads(公路网).
Beginning in 300 B.C., the Romans built roads in Europe, Asia and North Africa. By 200A.D., they had built 50, 000 miles of almost straight roads.
To build their roads, the Romans moved away all soft soil. They dug until they reached hard ground. Then they added layers(层)of stone and other things. The most important roads were paved(铺设)with large flat(平)stones. Main Roman roads were sometimes as wide as ours today.
To build their roads, the Romans sometimes had to dig tunnels through mountains. But they didn't have any machines to help them. So they heated the rock with fire and then threw coldwater over it. When the rock cracked(裂), they dug it out. Roman soldiers and slaves built the roads with their hands and simple tools, but the roads were so well built that they were used for hundreds of years.
(1). The story tells us ().
A、building roads without modern machines was Roman soldiers' only job
B、it was no easy job for the Romans to build their roads
C、people in advanced countries still use the old Roman way to build their roads today
D、most people in the African countries still use the old Roman way to dig their tunnels through the mountains
(2). To build mountain roads, the old Romans had to() .
A、explode the rock before they started to dig
B、crack the rock with fire and cold water
C、dig through the hard rock with their hands
D、invent some machines to help them with the work
(3). On the whole, the story is about().
A、how to build up our modern roads today
B、Roman tools in building a wide straight road
C、the Romans‘ roads built two thousand years ago
D、the reason why the Romans had to build their roads
(4). Why did the Romans build so many roads at that time It was because () .
A、their slaves and soldiers had to do something, or, they would have nothing to do
B、they dared not sail in the ocean and the roads were their only choice
C、they needed land trade roads and the roads to move their grand armies as quickly as possible
D、the old Romans wanted to show how clever they were in building the roads
(5). According to the passage, which of the following four choices is correct ()
A、The old Romans found soft soil did not make a solid base for the road.
B、The Romans built roads only on flat(平)land
C、Flat stones were mostly used in the roads of Asia
D、The old Romans used to make use of the soft soil for the base of their roads in North Africa

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1+Long ago, in 331 B. C., Greece conquered Egypt and built Alexandria. This city was named after Alexander the Great’ King of Greece. After Alexander’s death, a great general named Ptolemy became ruler of Egypt.
The Greeks loved learning. Ptolemy believed that people needed to have written records of their thoughts and ideas. They needed to have a place to collect their books. For the first time in history, Ptolemy tried to collect together all the Greek books that had been written. To do this, he built the largest and the best library in ancient world.
Before this time, great writings were often hard to find, and many had been lost. Books were then written by hand on a kind of paper called papyrus. Sheets of papyrus were rolled around wooden sticks. The papyrus rolls were stored in deep shelves on the library walls.
All books brought in Egypt were taken to the library. There scholars studied them and corrected any mistakes. The books were copied over so they would be easier to read and store. They were listed in catalog.
The library at Alexandria grew to have over a half million books. It was a center of learning for over 700 years before it was destroyed by fire in A. D. 391.
32、In this passage the word “scholars” means ________ .
A.people who fought as soldiers
B.people with much learning
C.people who taught in schools
D.people who wrote the Greek books
33、The passage does not say so, but it makes you think that ________ .
A.it was hard to make papyrus
B.copying books took a long time
C.no one ever read books at Alexandria
D.books from all over the world were brought to the library
34、Why did Ptolemy build a large library atAlexandria？
A.Because he thought it would make him as famous as Alexander the Great.
B.Because he wanted a safe place to collect all Greek books.
C.Because he wanted a new way to print books.
D.Because he wanted to correct all the mistakes in the books.

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