单项选择题

工程技术资料立卷时,案卷不宜过厚,一般不超过( )。
A、20mm
B、30mm
C、40mm
D、50mm

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未分类题
The author's attitude towards American food is that_______.A.American food is better than foods from other countries.B.American food is superior to European fooD.C.European food had helped enrich the flavors and varieties of American fooD.D.people from other countries could still identify from the American foods the foods that were unique to their countries.
A.A.American
B.
B.American
C.
C.European
D.
D.people
单项选择题
《伤寒发微论》的作者是
A.许叔微
B.王叔和
C.庞安时
D.成无己
E.王肯堂
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