Chinese scientists moved people away from the coming quake zone after noticing the strange
A. Right
B. Wrong
C. Not mentioned
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A task for future scientists is to find out how an animal receives a warning sigrlal.
A. Right
B. Wrong
C. Not mentioned
The new handgrip works in which of the following ways？
A. It call be commercialized.
B. It reduces the dangerous forces in bicycle accidents.
C. It adds a few dollars to the cost of a bike.
D. It changes the direction of the handlebars in all impact.
【B18】
A. about
B. at
C. on
D. for
A snow ranger uses very powerful guns ______.
A. to ware skiers of an approaching avalanche
B. to signal for help in an emergency
C. to create an avalanche
D. to communicate with the ski area' operator
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