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【多选题】
与增量法相比,减量法称量的特点有哪些A.
称量准确度高，能够扣除环境和仪器误差
B.
称量试剂不易变质
C.
称量准确度高，可以避免操作误差
D.
对仪器精密度和环境要求较高
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举一反三
【简答题】You keep it to watch your house．
【简答题】What is the difference between the Quantitative and Qualitative research?
【单选题】—Mom, can I watch TV? —Yes, but you must do your homework _________ you can watch it.
A.
before
B.
after
C.
because
D.
or
【多选题】To differentiate qualitative and quantitative research, we could apply the following criteria:
A.
The general ideological orientation
B.
The method of data collection
C.
The nature of the collected data
D.
The method of data analysis and processing
【简答题】Where did you get your watch (repair) ______?
【单选题】下列说法不正确的是（ ）
A.
任何矩阵经过若干次初等行变换一定可以化为行最简形
B.
矩阵与它的行最简形之间是等价的关系
C.
矩阵与它的行最简形之间是相等的关系
D.
当一个矩阵可以通过初等列变换化为单位阵时，它一定可逆
【判断题】The critical age for language acquisition refers to the qualitative difference in language acquisition before and after the age around fifteen.()
A.
正确
B.
错误
【单选题】The goods you made according to the sample given are ()your favor.
A.
to
B.
with
C.
in
D.
of
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