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
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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
用下列组成量度表示法表示某溶液的组成时，其数值不受温度影响的是
A. 物质的量浓度
B. 质量摩尔浓度
C. 体积分数
D. 质量浓度
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