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【简答题】
下列物质中哪些可用直接法配制标准溶液?哪些只能用标定法配制? NaCl， KOH， H 2 SO 4 ， KMnO 4 ， K 2 Cr 2 O 7 ， KIO 3 ，Na 2 S 2 O 3 ·5H 2 O，AgNO 3
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【单选题】Better go and ask him when he _____ . We must see him off when he _____. [ ]
A.
is leaving; leaves
B.
leaves; is leaving
C.
leaves; left
D.
left; was leaving
【简答题】中心受压砌体中的砖处于()的复杂应力状态下。 I.受压II.受弯III.受剪IV.局部受压V.横向受拉A. Ⅰ、Ⅱ B. Ⅰ、Ⅱ、Ⅲ C. Ⅰ、Ⅱ、Ⅲ、Ⅳ D. Ⅱ、Ⅲ、Ⅳ、Ⅴ
【简答题】中心受压砌体中的砖处于( )的复杂应力状态下。I.整体受压II.受弯III.受剪IV.局部受压V.横向受拉
【单选题】--- Could you tell me __________? --- Certainly. In half an hour.
A.
when will the train to Beijing leave
B.
when the train to Beijing would leave
C.
when the train to Beijing left
D.
when the train to Beijing will leave
【单选题】中心受压砌体中的砖处于 ( ) 的复杂应力状态下。 I. 受压 II. 受弯 III. 受剪 IV. 横向受拉
A.
Ⅰ.Ⅱ
B.
Ⅰ.Ⅱ.Ⅲ
C.
Ⅰ.Ⅱ.Ⅲ.Ⅳ
D.
Ⅱ.Ⅲ.Ⅳ
【单选题】________ is often the case with human beings, many animals sleep a lot when young, but sleep much less when they get older.
A.
Which
B.
What
C.
As
D.
That
【单选题】When we arrived in the middle of the night, there was no food ______ as all the shops were shut.
A.
left
B.
available
C.
remaining
D.
convenient
【简答题】新建文件table.htm,实现如下效果: 请上传文件或复制源代码。
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