题目内容
I have __________ written my composition, but she hasn’t __________.A.yet, already | B.ever, never | C.already, yet | D.already, still |
C解析:
略
略
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如图,A池用石墨电极电解NaOH溶液,B池精炼粗铜,一段时间后停止通电,A池中d极产生具有氧化性的气体在标准状况下为2.24L。下列说法正确的是( )
A.A池为电解池,B池为原电池 |
B.d、e两极都发生氧化反应 |
C.e极应为粗铜板材料 |
D.B池中e极质量增加12.8g |
He usually does his homework two hours in the evening.
A.about | B.to | C.in | D.for |
----The radio is too noisy. __________, please.
-----All right. I’ll do it
-----All right. I’ll do it
A.Turn it off | B.Turn it on | C.Open it | D.Close it |