在小组合作活动基础之上展开的中等程度的竞争活动，即适量和适度的小组合作与竞争方法的结合，才会发挥个体与
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According to Paragraph 2, which of the following statements is true relating to the groups
A. The four drugs are different only in the form.
B. All four drugs work against one kind of virus.
C. The two groups of drugs inhibit different viruses
D. Both groups of drugs are effective against type B.
According to Paragraph 7, Henry Ford left the Detroit Edison Illuminating Company because______.
A. he couldn"t accept the low salary there
B. he wanted more time to work on automobile building
C. he was faster than anyone else at making repairs
D. thomas Edison encouraged him to quit his job
The authors description of the effect of music on driving mentions all of the following EXCEPT______.
A. music may calm you down but it can also lead to traffic accidents
B. drivers who listen to music while driving are dangerous
C. high-tech music systems built in cars do not cause car accidents
D. different music leads to different driving styles
According to the passage, all of the following are the solutions recommended EXCEPT______.
A. raising taxes on petrol
B. encouraging the use of diesel oil
C. using catalytic converters
D. making cars more expensive
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