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【单选题】
下列各组实验中，反应最快的是（ ） 组号 温度 Na 2 S 2 O 3 H 2 SO 4 H 2 O体积 体积 浓度 体积 浓度 ① 0℃ 10mL 0.1mol?L -1 10mL 0.1mol?L -1 0 ② 10℃ 5 mL 0.1mol?L -1 5 mL 0.1mol?L -1 10mL ③ 30℃ 5 mL 0.1mol?L -1 5 mL 0.1mol?L -1 10mL ④ 30℃ 5 mL 0.2mol?L -1 5 mL 0.2mol?L -1 10mLA.
①
B.
②
C.
③
D.
④
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反馈参考答案：
举一反三
【单选题】What happened when the man started to boot up? ( )
A.
He got his data back.
B.
The screen went black.
C.
He solved the problem.
D.
The computer made a strange noise.
【单选题】All that I have to do______to boot up my laptop and download more songs from iTunes.
A.
is
B.
are
C.
was
D.
were
【单选题】Lin Tao wants to show Ben Black _______.
A.
only the golf course
B.
the hillside
C.
around the town
D.
some parks
【单选题】During boot-up, the memory test:
A.
Is a superfluous step that should be ignored
B.
Checks and verifies that contiguous memory is installed
C.
Is an operational error
D.
Displays what memory is installed, but nothing else
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