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【单选题】
常温时，下列叙述正确的是A.
pH＝9的NH 4 Cl与NH 3 ?H 2 O混合溶液中c(Cl - )>c(NH 4 + )
B.
pH＝2.5的可乐中c(H ＋ ) 是pH＝3.5的柠檬水中c(H ＋ )的10倍
C.
AgCl在0.1mol /L CaCl 2 溶液和0.1mol/L NaCl溶液中的溶解度相同
D.
1 mL 1mol /L Na 2 CO 3 溶液加水稀释至100mL， pH和K w 均减小
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【单选题】词汇题 He _______ out of the window and saw that it was raining.
A.
looked
B.
saw
C.
remarked
D.
watched
【简答题】数据库应用 一、实验目的 1． 掌握数据清单的应用。 2． 掌握数据排序的操作。 3． 掌握数据筛选的操作。 4． 掌握分类汇总的操作。
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【单选题】Getting help from him is ______ he is such a selfish person.
A.
out of the question
B.
out of question
C.
in the question
D.
in question
【单选题】Though he was____ trouble after he was wounded, he managed to escape____ caught by the enemy.
A.
out of ; being
B.
in ; being
C.
on ; to be
D.
in ; to be
【单选题】Luckily, we'd brought a road map without _____ we would have lost our way. [ ]
A.
it
B.
that
C.
this
D.
which
【单选题】'Does Professor O' hare live near the downtown area?' 'No, he lives ______.'
A.
out in the suburbs
B.
out in suburb
C.
in the out suburbs
D.
in suburb
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