更多"W: I don’t know why, but sinc"的相关试题:
[填空题]Susan(change) ______ a lot since I last saw her.
[填空题]Mary (change) ______ a lot since I last saw her.
[填空题]The professor wanted to know why many of her students did not complete their work or ask for help. She (47) to do a research project. She got the (48) of the university ethics committee. Such groups consider moral and legal (49) in studies.
In the spring of 2002, she (50) to her own university under the name "Rebekah Nathan" and was (51) . She lived in student housing. She took five classes during her first term and two in the second semester. She did pretty well, although she got one C, a mark of (52) . She also played sports.
The professor says her year as a student changed the way she teaches. She gives less reading now. She asks questions (53) to get students to speak more. She offers help. And she says she is no longer (54) if a student falls asleep.
Other professors and research experts, however, criticize the experiment. They say she was (55) . They say she could
[单项选择]Do you know why different animals or pests have their special colors Colors in them seem to be used mainly to protect themselves.
Some birds like eating locusts(蝗虫), but birds cannot easily catch them. Why It is because locusts change their colors together with the change of the colors of crops. When crops are green, locusts look green. But as the harvest time comes, locusts change to the same brown color as crops have. Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.
If you study the animal life, you’ll find the main use of coloring is to protect themselves. Bears, lions and other animals move quietly through forests. They cannot be easily seen by hunters. This is because they have the colors much like the trees.
Have you ever found an even more strange act A kind of fish in the sea can send out a kind of very black liquid(液体)when it faces danger. While the liq
A. Because it is very big and strong.
B. Because the liquid it sends out can help it escape from its enemies.
C. Because the liquid it sends out can kill its enemies.
D. Because it swims faster than any other fish.
