更多"Why did the resistance of insects t"的相关试题:
[单项选择]Why did the resistance of insects to man-made insecticides develop so rapidly
A. Because farmers use less insecticides now.
B. Because farmers have been using insecticides for many years.
C. Because insects axe using the mechanisms against poisons produced by plants to deal with insecticides.
D. Because insects have been eating plants for many million years.
[单项选择]Why did she feel guilty
A. She had to work instead of doing homework.
B. She spent all her time sleeping.
C. She spent all her time reading stories online.
[单项选择]Why did the building get sick
[单项选择]Why did Alfred Nobel invent dynamite
A. To defeat enemies.
B. To earn more money
C. To improve the peacetime industries of mining and road building.
D. To replace the old explosive.
[单项选择]Why did Coffman request an investigation
A. To see if there was a deliberate cover-up of the problem.
B. To find out the extent of the consequences of the case.
C. To make sure that the school principals were innocent.
D. To stop the voters approving the $ 212 million bond issue.
[单项选择]Why did the small woman cry
A. Because Mr. Smith was bad at singing.
B. Because all the guests enjoy the song very much.
C. Because she thought of her hometown England.
[单项选择]Why did people cut down trees
A. For advantage.
B. For benefit.
C. For house.
D. For business.
[单项选择]Why did the protest take place
A. The railway lines cut through their crop fields.
B. There were great noises at the local railway station.
C. Another railway line would be built.
D. A rubbish dumping area would be reuse
[单项选择]Why did marines gather on Monday
A. To remember the death of 23 soldiers.
B. To call for the U.S. administration for compensation.
C. To call for social justice.
D. To remember the death of Iraqi civilians.