【名词&注释】
成年人(adult)、过去分词(past participle)、孩子们、低压槽(pressure trough)、连接词。
[单选题]下列叙述正确的是
A. 0.1 mol/LC6H5ONa溶液中:c(Na+)>c(C6H5O-)>c(H+)>c(OH-)
B. Na2CO3溶液加水稀释后,恢复至原温度,pH和Kw均减小
C. pH=5的CH3COOH溶液和Ph=5的NH4Cl溶液中,c(H+)不相等
D. 在Na2S溶液中加入AgCl固体,溶液中c(S2-)下降
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学习资料:
[单选题]M、N、P、Q四地中,阴雨天气最有可能出现在
A. M地 B. N地
B. P地 D. Q地
[单选题]The children loved their day trip, and they enjoyed the horse ride .
A. most
B. more
C. less
D. little
[单选题]The school rules state that no child shall be allowed out of the school during the day, ______ accompanied by an adult.
A. once
B. when
C. if
D. unless
[单选题]43________
A. easy
B. active
C. adventurous
D. extra
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