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【单选题】
幼儿每日铁的供给量标准为 mg
A.
800
B.
400
C.
10
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【单选题】铺复合木地板面层前,需要先(),错误的时
A.
安装木龙骨
B.
铺泡沫塑料薄膜垫层
C.
先基层处理,使基层平整,若不平整可用橡胶垫垫平
D.
先铺垫层,垫层可增加地板的隔潮作用,减少走路时产生的噪音
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A.
正确
B.
错误
【简答题】Pulling heavy suitcases all day in the summer is hard work, especially when you're a thin 14-year-old.That was me in 1940-the youngest and smallest baggage boy at New York City's Pennsyl-vania Railway...
【单选题】---Is it heavy? ---No. It’s as ______as a book.
A.
heavy
B.
heavier
C.
light
D.
lighter
【多选题】某船垂线间长平均分为 9 个站距,其近似计算法可采用( )。
A.
梯形法
B.
辛浦生一法
C.
辛浦生二法
D.
乞贝雪夫法
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