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【单选题】
Let’s put the matter to the vote and not waste our time arguing about it, ____?A.
shall we
B.
can we
C.
may I
D.
will you
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举一反三
【单选题】This service should be available to everybody, irrespective __________ whether they can afford it.
A.
to
B.
for
C.
on
D.
of
【单选题】Windows Communication Foundation (WCF) service will be hosted in Microsoft Internet Information Services (IIS).You create a new application in IIS to host this service and copy the service DLL to the ...
A.
Create an asmx file and add a @ServiceHost directive to this file. Copy the file to the root of the application directory.
B.
Create an .asmx file and add a @Register directive to this file. Copy the file to the bin directoyy of the application.
C.
Create a svc file and add a @ServiceHost directive to this file. Copy the file to the root of the application directory.
D.
Create a .svc file and add a @Register directive to this file. Copy the file to the bin directory of the application.
【简答题】当条件具备时,结果不会发生;而条件不具备时,结果一定会发生的逻辑叫 。
【单选题】称取 0.5000g H 2 C 2 O 4 · H 2 O 基准物于锥形瓶中,加 30m L 纯水溶解,合理的操作是
A.
用量杯或量筒取 30mL 纯水
B.
用吸量管准确量取 30mL 纯水
C.
不必用量器，估计加入适量水既可
D.
将锥形瓶干燥后，用量杯加 30mL 纯水
【单选题】This service should be available________ everybody, regardless of whether they can afford it.
A.
to
B.
with
C.
in
D.
from
【简答题】今分析某硅酸盐样品,称取试样 0.5000g ,采用适当方法完全溶解后将所含的 Fe 3+ 还原为 Fe 2+ ,用 KMnO 4 标准溶液滴定,消耗 KMnO 4 溶液 25.00ml ,再称取试样 0.5000g ,用重量法分析,得到 Fe 2 O 3 和 Al 2 O 3 总质量为 0.4500g 。已知 1ml 的 KMnO 4 溶液相当于 0.006301g 的 H 2 C 2 O 4 ...
【单选题】称取铁矿石0.5000g，用酸溶解后加SnCl2，Fe3+将还原为Fe2+，然后用24.50mL KMnO4标准溶液滴定。已知1mL KMnO4相当于0.01260g H2C2O4?2H2O，问矿样中Fe的质量分数为（H2C2O4?2H2O ：126.07，Fe：55.85）
A.
0.5473
B.
5.473
C.
54.73
D.
5.473%
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