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【判断题】
混凝土属于有机材料
A.
正确
B.
错误
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参考答案:
举一反三
【单选题】一切矿藏、水流、森林、山岭、草原、荒地和滩涂都属国家所有。
A.
B.
【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
【单选题】一切矿藏、水流、森林、山岭、草原、荒地和滩涂都属于国家所有。( )
A.
B.
【判断题】一切矿藏、水流、森林、山岭、草原、荒地和滩涂都属国家所有。( )
A.
正确
B.
错误
【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
【单选题】下列离子方程式中,属于水解反应的是
A.
HCO 3 - +H 2 O H 3 O + +CO 3 2 -
B.
HCO 3 - +H 2 O H 2 CO 3 +OH -
C.
CO 2 +H 2 O HCO 3 - +H +
D.
CH 3 COOH CH 3 COO - +H +
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