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【单选题】
The main idea of the story is that ________.A.
) Dorothy, the mother in the house, quarreled with her daughter-in-law and decided to leave and start over
B.
) Dorothy and Tim, as mother and son, overcame a misunderstanding and made up to each other at last
C.
) thinking that she was redundant in the house, Dorothy decided to leave but her son and daughter-in-law convinced her that she was welcome and needed
D.
) Dorothy was worried about her place in the house when her daughter-in-law began to stay at home full time
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举一反三
【单选题】298K 时,浓度均为 0.01mol · kg -1 的下列电解质溶液,离子平均活度系数 γ ± 最大的是
A.
CuSO 4
B.
CaCl 2
C.
LaCl 3
D.
NaCl
【单选题】下列关于多发性骨髓瘤的描述正确的是:
A.
血尿酸升高
B.
尿B-J蛋白阴性可排除该病
C.
骨髓中病理性浆细胞>5%可诊断
D.
血浆中免疫球蛋白增高可诊断
E.
血沉加快
【单选题】298K 0.01mol•kg -1 的 CaCl 2 水溶液中, CaCl 2 的离子平均活度系数 γ ± 为( )
A.
0.847
B.
0.791
C.
0.889
D.
0.666
【单选题】298K0.005mol·kg -1 的KCl溶液和0.005mol·kg -1 的NaAc溶液的离子平均活度系数分别为γ ±,1 和γ ±,2 则有 ( )
A.
γ ±,1 =γ ±,2
B.
γ ±,1 ＞γ ±,2
C.
γ ±,1 ＜γ ±,2
D.
γ ±,1 ≥γ ±,2
相关题目：
【单选题】298K 0.01mol•kg -1 的 CaCl 2 水溶液中, CaCl 2 的离子平均活度系数 γ ± 为( )
A.
0.847
B.
0.791
C.
0.889
D.
0.666
参考解析：
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