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【单选题】
欲配制1000mL0.1mol/LHCl溶液,应取浓度为12mol/L的浓盐酸()。
A.
0.84mL
B.
8.3mL
C.
1.2mL
D.
12mL
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举一反三
【单选题】I haven’t heard from Bill ________ he left here.
A.
when
B.
before
C.
since
D.
while
【单选题】____, I haven’t heard from him yet.
A.
Up to now
B.
Therefore
C.
Even if
D.
As though
【单选题】--I haven’t heard from John for a long time.
A.
What do you suppose _______to him?
B.
was happening
C.
has happened
D.
to happen
E.
had happened
【单选题】在汽车的顶起过程中、( )在车下作业。
A.
B.
允许
C.
不可以
D.
禁止
【简答题】“I haven’t heard from my parents these days,” said Mary.
【简答题】灌注桩施工平台的设计应满足哪些要求?() A.平台尺寸应能满足钻孔设备的布置、操作、移动和混凝土浇筑的要求,平台顶标高的确定应考虑施工期水位、潮位、波浪和钻孔工艺等因素。 B.平台应具有足够的稳定性,应能承受施工设备、材料和人员的荷载,并能承受水流力、波浪力、风力和施工船舶系靠力等荷载。 C.平台结构应考虑装拆方便和成桩后下一步工序的施工。 D.平台顶标高高于水面即可。 E.平台应具有安全生产设施...
【单选题】I haven’t heard from him ()he left home.
A.
when
B.
since
C.
as
D.
if
【单选题】U盘是一种___的外存储器
A.
只能读出,不能写入
B.
只能读出C??易失性
C.
易失性
D.
?可以读出,也可以写入。
【单选题】—I haven’t heard from Henry for a long time. —What do you suppose____ to him?
A.
was happening
B.
to happen
C.
had happened
D.
has happened
【简答题】影响仓库总体布局的因素有( )。A. 存货特点 B、仓库类型 C、气候条件 D、生产布局
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