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【单选题】
对材料的抗渗性的表述正确的是( )。A.
抗渗性可以用抗渗系数表示，其值越大，抗渗性越好
B.
抗渗性可以用软化系数表示，其值越大，抗渗性越好
C.
抗渗性可以用抗渗等级表示，其值越大，抗渗性越好
D.
抗渗性可以用抗渗等级表示，其值越小，抗渗性越好
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【单选题】Who are the worst sleepers based on a survey of the people in 13 countries around the world?
A.
The French people.
B.
The German people.
C.
The British people.
D.
The American people.
【单选题】According to the speaker, German people may use more __________ words to describe the ________ because of the grammatical gender of the noun in the German language.
A.
masculine, sun
B.
feminine, bridge
C.
masculine, bridge
【单选题】Q: Stalin was not prepared for Hitler's attack. What did he do in the face of the German invasion? He instructed the Russian people to “ _________ ” in front of the German invaders.
A.
scratch the earth
B.
scorch the earth
【简答题】氯化物检查中，配制标准氯化钠溶液1000ml（ ）。
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