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【多选题】
水准测量的误差来源是（）A.
仪器误差
B.
水准尺误差
C.
观测误差
D.
天气误差
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皮皮学刷刷变学霸
举一反三
【单选题】We should look ______ the matter before we reach a conclusion.
A.
into
B.
for
C.
to
D.
at
【简答题】腐乳生产中常见的几种质量问题?
【单选题】By no means______look down upon the unemployed.
A.
we
B.
should we
C.
should not we
D.
we should
【单选题】We should look ______ the matter before we reach a conclusion．A.intoB.for
A.
We should look ______ the matter before we reach a conclusion． A.into
B.
for
C.
to
D.
at
【单选题】We should the new words that we don't know how to spell. [ ]
A.
look for
B.
look after
C.
look up
D.
look down
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