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【判断题】
哲学的词源有“爱智慧”的意思。A.
正确
B.
错误
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【单选题】You have to finish all the cleaning by yourself, ______? [ ]
A.
haven't you
B.
can't you
C.
have you
D.
don't you
【单选题】Could you tell me how long __________ the football club?
A.
you have joined
B.
have you joined
C.
you have been in
D.
have you been in
【简答题】（10分）为了测定实验室长期存放的Na 2 SO 3 固体的纯度，某化学活动小组设计了多种实验方案。准确称取W g固体样品，配成250mL溶液。分成三组进行实验： 甲组：量取25.00mL上述溶液，加入足量的盐酸酸化的BaCl 2 溶液，过滤、洗涤和干燥沉淀，称得沉淀的质量为m 1 g 乙组：量取25.00mL上述溶液，加入足量的盐酸酸化的Ba(NO 3 ) 2 溶液，过滤、洗涤和干燥沉淀，称重，...
【单选题】How long _____ here in our city? [ ]
A.
have you come
B.
have you been
C.
you have come
D.
your have been
【单选题】If you come to the party, you ________ a good time. [ ]
A.
would have
B.
have
C.
will have
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