The children went home from school, their lessons _________ for the day.
A. finishing
B. finished
C. had finished
D. were finished
查看答案
The thief stood before the policeman，_______ admitting what he had done．
A. with his dropping head
B. dropped his head
C. raising his head
D. with his head down
All things _______，the plan trip will have to be called off．
A. be considered
B. considered
C. considering
D. having considering
符号b（3H3PO4）=0.01 mol/kg 表示
A. 每千克溶液中溶解H3PO4的总量是0.01 mol
B. 每千克溶液中溶解H3PO4的总量是0.03 mol
C. 每千克溶剂中溶解H3PO4的总量是0.01 mol
D. 每千克溶剂中溶解H3PO4的总量是0.03 mol
配制300 ml 0.10 mol/L NaOH溶液，需要称取固体NaOH的质量是
A. 1.2g
B. 1.2mg
C. 4.0g
D. 4.0mg
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