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【单选题】
电力变压器通常分为( )和( )变压器。A.
高压,低压
B.
低压,升压
C.
降压,升压
D.
高压,降压
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【判断题】( ) 8. People use special drilling machines in order to protect the wildlife
A.
正确
B.
错误
【单选题】The environment on this planet is worsening, for few people___measures to protect it in the last twenty years.
A.
takes
B.
took
C.
have taken
D.
should taken
【简答题】People wear it to protect their feet.
【简答题】Something protect people from rain.
【单选题】Do you know insurance(保险)? Buying insurance is a【C1】______by which people can protect themselves【C2】______large losses. Protection against fire is one kind of insurance. Large numbers of people pay【C3...
A.
idea
B.
sole
C.
thought
D.
means
【简答题】一切矿藏、水流、森林、山岭、草原、荒地和滩涂都属国家所有。判断对错
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