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【多选题】
在普通砼中掺入引气剂,能( )A.
改善拌合物的和易性
B.
切断毛细管通道，提高砼抗渗性
C.
使砼强度有所提高
D.
提高砼的抗冻性
E.
用于制作预应力砼
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皮皮学刷刷变学霸
举一反三
【单选题】Egypt 's influence in the region has been gradually changing; Saudi Arabia ,an oil rich county, is now the domineering force.
A.
This is a correct sentence.
B.
This sentence is a run-on sentence.
C.
It's a sentence fragment.
D.
This sentence has a comma splice.
【单选题】The author suggests that the main reason for the persisting influence of Bachofen's work is that ______.
A.
feminists have shown little interest in ancient societies
B.
Bachofen's knowledge of Amazonian culture is unparalleled
C.
reliable information about the ancient world is difficult to acquire
D.
historians have been primarily interested in the modern period
【单选题】去掉文本超链接的下划线的方法是 。
A.
a{text-decoration:no underline;}
B.
a{underline:none;}
C.
a{decoration:no underline;}
D.
a{text-decoration:none;}
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