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【多选题】
为防止大体积混凝土结构浇筑后产生裂缝，采取的相应措施有( )。A.
优先选用水化热低的水泥
B.
掺入适量的粉煤灰
C.
加快浇筑速度和增加浇筑层厚度
D.
采用蓄水法或覆盖法进行人工降温措施
E.
在满足设计强度要求下，尽可能减少水泥用量
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举一反三
【单选题】We can learn from the passage that______.
A.
the upper class is powerful and influential
B.
the upper class collects rare books to make money
C.
the upper class holds all top government positions
D.
the 'old rich' makes much more money than the 'new rich'
【简答题】填写8位数商品编码: 粗甘油(甘油含量 78% ,用于生产油墨等)( )
【单选题】We can learn from the text that human beings have a history of ______.
A.
fascination for the academic establishment
B.
enthusiasm for juvenile psychology
C.
disbelief in the novel medium
D.
hatred of political corruption
【单选题】We can learn from the passage that______.
A.
the upper class is powerful and influential
B.
the upper class collects rare books to make money
C.
the upper class holds all top government positions
D.
the 'old rich' make much more money than the 'new rich'
【简答题】We can learn from the passage that the health spending in any other OECD is ______ than that in America.
【单选题】We can learn from the passage that the shoot system of the perennials ______.
A.
can help the perennials absorb less of the sun's ray
B.
decides the appearance of the perennials in desert
C.
limits the function of the perennials' branches
D.
may prevent the perennials from losing much water
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