It’sstillearly.Howabout________thepianoforawhile？A.toplayB.playC.doyoup

第1题

Human's Hands Archaeological records--paintings, drawings, and carvings of humans engaged
Human's Hands
Archaeological records--paintings, drawings, and carvings of humans engaged in activities involving the use of hands--indicate that humans have been predominantly right - handed for more than 5,000 years. In ancient Egyptian artwork, for example, the fight-hand is depicted as the dominant one in about 90 per cent of the examples. Fracture or wear patterns on tools also indicate that a majority of ancient people were fight - handed.
Cro-Magnon cave paintings some 27,000 years old commonly show outlines of human hands made by placing one hand against the cave wall and applying paint with the other. Children today make similar out lines of their hands with crayons on paper. With few exceptions, left hands of Cro-Manganese are displayed on cave walls, indicating thai the paintings were usually done by right-handers.
Anthropological evidence pushes the record of handedness nearly human ancestors back to at least 1.4 million years ago. One important line of evidence comes from flaking patterns of stone cores used in tool making: implements flaked with a clockwise motion (indicating a right- handed toolmaker) can be distinguished frp, those flakea wan a counter- clockwise rotation (indicating a left -handed toolmaker).
Even scratches found on fossil human teeth offer clues. Ancient humans are thought to have cut meat into strips by holding it between their teeth and slicing it with stone knives, as do the present -day Inuit. Occasionally the knives slip and leave scratches on the users' teeth. Scratches made with a left - to - right stroke direction (by right-handers) are more common than scratches in the opposite direction (made by left-handers).
Still other evidence comes from cranial morphology: scientists think that physical differences between the right and left sides of the interior of the skull indicate subtle physical differences between the two sides of the brain. The variation between the hemispheres corresponds to which side of the body is used to perform. specific activities. Such studies, as well as studies of tool use, indicate that right - or left – sided dominance is not exclusive to modem Homo sapiens. Populations of Neanderthals, such as Homo erects and Ho mo habilis, seem to have been predominantly right -handed, as we are.
What is the main idea of the passage？
A．Human ancestors became predominantly right- handed when they began to use tools.
B．It is difficult to interpret the significance of anthropological evidence concerning tool use,
C．Human and their ancestors have been predominantly right -handed for over a million years.
D．Human ancestors were more skilled at using both hands than modem humans.

点击查看答案

第2题

已知含氧酸可用通式（HO）mXOn表示，如X是S，n＝2，m＝2，则这个式子表示为H2SO4。一般而言，该式中n大的是强酸，n小的是弱酸。下列各含氧酸中酸性最强的是（）

A、HClO3

B、H2SeO3

C、H2BO2

D、HMnO4

点击查看答案

第3题

已知含氧酸可用通式（HO）nXOm来表示，如X是S，m＝2，n＝2，则这个式子就表示H2SO4。一般而言，该式中m大的是强酸，m小的是弱酸。下列各含氧酸中酸性最强的是（）

A、HClO4

B、H2SeO3

C、H3BO3

D、H3PO4

点击查看答案

第4题

However,in too many countries and societies, women's social () is still low.

点击查看答案

第5题

Li: Hello. I'm ringing about the flat advertised in today's STAR. （）？ Mrs. Green: Yes, it is. Two or three people have rung up about it, but nobody's been to see it yet.

A、Is it still available

B、Is it still empty

C、Is it still free

D、Is it still blank

点击查看答案

第6题

No rush, sir, the plane will take off in 15 minutes, there`s still （) leftA.enough timeB.m
No rush, sir, the plane will take off in 15 minutes, there`s still () left
A.enough time
B.much time
C.many time
D.a few time

此题为多项选择题。请帮忙给出正确答案和分析，谢谢！

点击查看答案

第7题

英译汉：Look out the window it's still raining today!

点击查看答案

第8题

It’s still a puzzle______he became rich overnight.
A、what
B、that
C、how
D、which

请帮忙给出正确答案和分析，谢谢！

点击查看答案

第9题

Would you like some more coffee？ There's still （） left.

A、little

B、a little

C、a few

D、few

点击查看答案

第10题

The writer can’t see Aunt Lucy (). He’s having breakfast.

A、now

B、still

C、often

D、always

点击查看答案

It’s still early. How about ________ the piano for a while？A. to playB. playC. do you p