滚搓法测土的塑限，土条搓至直径达多少时，产生裂缝并开始断裂时土的含水率为塑限______
A. 2mm
B. 3mm
C. 5mm
D. 1mm
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塑性图是哪两个指标的关系曲线______
A. hP—wL
B. ΙP—wP
C. wP—wL
D. ΙP—wL
通过手捻试验结果，下列哪种土的塑性高______
A. 稍有滑腻感，有砂粒，捻面稍有光泽
B. 手感滑腻，无砂，捻面光滑
C. 稍有黏性，砂感强，捻面粗糙
D. 无法判断
Now listen to the following recording and answer questions 23 to 25.
A. Poor Internet connectivity in the country.
B. Expensive Internet-ready mobile phones.
C. The lack of schools and work places.
Difficult access to Internet cafes.
Now listen to the following recording and answer questions 23 to 25.
A. Internet connectivity will be guaranteed.
B. The rich will have access to the Internet.
C. A new generation of Internet will become rich.
D. Middle-class Internet users will increase.
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