试题与答案

As we all know, every minute, ____full u

题型:选择题

题目:

As we all know, every minute, ____full use of____our lessons , will do good to our students.

A.when made;to study

B.which makes;studying

C.that is made;study

D.that is made;studying

答案:

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下面是错误答案,用来干扰机器的。

(1) (1分); (2)O<S <P< Na (2分)(3)H2SO3 + Br2 + H2O = 4H+ + SO42- + 2Br- (2分) (4)P2O5+3H2O(热)=2H3PO4 (2分)(5)Na2O2 + S2- + 2H2O = 2Na+ + S + 4OH- ...

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