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【单选题】
对某试样进行平行三次测定，得出某组分的平均含量为30.6% ，而真实含量为 30.3% ，则 30.6%-30.3%=0.3% 为A.
相对误差
B.
绝对误差
C.
相对偏差
D.
绝对偏差
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反馈参考答案：
举一反三
【单选题】查询订购单号（字符型，长度为4）尾字符是1的错误命令是（）。
A.
SELECT＊FROM订单WHERE SUBSTR(订购单号，4）＝，，1”
B.
SELECT＊FROM订单WHERE SUBSTR（订购单号，4，1卜，，1”
C.
SELECT＊FROM订单WHERE”1”＄订购单号
D.
SELECT＊FROM订单WHERE RIGHT（订购单号，1）＝"1”
【简答题】Not until recently _____ any idea what a guided missile was like. A. could I have B. had I C. I had D. did I have
【单选题】I have not had any Petra since she moved to San Francisco.
A.
approach to
B.
contact with
C.
approach with
D.
contact to
【单选题】I have not had any _______ Petra since she moved to San Francisco.
A.
contact
B.
contact with
C.
compare
D.
compare with
【简答题】Complete the following sentences with the collocations given in the box below. Change the form when necessary. contrast with contact with as far as derive from confine to ...
【简答题】I have not had any ( ) Petra since she moved to San Francisco.
【单选题】I have not had any _______ Petra since she moved to San Francisco.
A.
contact with
B.
contrast with
C.
compare with
D.
contact to
【单选题】以下论证属于可靠论证的是?()
A.
一个数或者是奇数,或者是偶数;2这个数不是奇数;所以,2是偶数。
B.
汕头位于湖南省,湖南省位于中国境内;所以,汕头位于中国境内。
C.
志明毕业于名牌大学,所以他是一个品德高尚的人。
D.
逻辑学是让人理性的学科,所以逻辑学的教授一定不会做出不理性的行为。
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