题目内容
（请给出正确答案）
The rats fed unrestricted diets do NOT
A．have one preventing-aging protein increased.
B．have their cell death increased or doubled.
C．have their DNA fragmentation doubled.
D．have the levels of proteins increased.
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更多“The rats fed unrestricted diet…”相关的问题
The Government ordered everybody to kill rats. Most people were lazy, so they didn't kill many. The Government promised to pay some money for each dead rat. That made the people very happy. They killed thousands of rats everyday. A Government officer put all the dead rats in a big pile. Sometimes a man brought hundreds in one day.
After two weeks there were not many rats in the city, but people still brought many rats to the Government office. The Government officer thought that people were stealing dad rats from the pile. He ordered his men to dig a deep hole and put the rats in it. Soon there were no more rats, and the Government didn't pay any more money.
1)、Newton is a place which ______.
A.used to be very clean
B.is no longer a city
C.is very clean
D.will be very clean
2)、When the Government first ordered the people to kill rats, the people ______.
A.asked for some money for each dead rat
B.stole dead rats from the pile
C.were too lazy to kill many rats
D.killed nearly all the rats quickly
3)、The people killed rats ______.
A.to get money from the Government
B.to help the Government make the city clean
C.to make the Government officer happy
D.to protect(保护)their cats and dogs
4)、A deep hole was dug so that ______.
A.the rats couldn't come out to attack people at night
B.people could take rats from it easily
C.people would kill more rats
D.nobody could take any rats from the pile
5)、What is the best topic for this passage？
A.How to Kill Rats
B.Newton一A City of Rats
C.How Newton Became a Very Clean Place
D.How Newton Became a Famous City
A.donkeys
B.tigers
C.female deer
D.house rats
A．be fed
B．feed
C．having fed
D．being fed
A.feed
B.fed
C.feeding
D.be fed
A.fed on
B.conjured up
C.contributed to
D.broke up
