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【判断题】
石英的主要成分是二氧化硅。A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】This is a story about ______.
A.
a rich man who owned a big wood
B.
a poor Irishman who lived all by himself
C.
a clever man who tried to get something to eat for his breakfast
D.
an Irish hunter with a large family
【简答题】At one time there was a romantic vision of homeless wanderers who lived carefree lives and answered to no one.(翻译)
【单选题】1998年，美国发射的月球勘探者号在为期10个月的探测中，发现月球的()存在水冰，总的储量可能有1100万吨至3.3亿吨之多。
A.
南极和北极的阴暗处
B.
月海中
C.
月面之下
D.
月壤中
【单选题】1998年，美国发射的月球勘探者号在为期10个月的探测中，发现月球的（）存在水冰，总的储量可能有1100万吨至3.3亿吨之多。
A.
月海中
B.
月面之下
C.
月壤冻土中
D.
南极和北极的阴暗处
【单选题】1998年，美国发射的月球勘探者号在为期10个月的探测中，发现月球的（）存在水冰，总的储量可能有1100万吨至3.3亿吨之多。
A.
月海中
B.
月面之下
C.
月壤冻土中
D.
南极和北极
【单选题】We should not let our grandparents ,who are too old and weak , alone.
A.
live
B.
living
C.
to live
D.
lived
【单选题】What do we know about the Pompeiians who lived 2000 years ago?
A.
They lived more or less the same as Italians now do.
B.
They liked women wearing all kinds of makeup.
C.
They enjoyed a lazy life with drinking and eating.
D.
They went back to Pompeii after the eruption in AD 79.
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