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问题 单项选择题

内摩擦角与黏聚力是()的两个力学指标。

A．土黏结强度

B．土固化强度

C．土抗剪强度

D．土抗压强度

答案

参考答案：C

解析：内摩擦角反映了土的摩阻性质，黏聚力包括土粒间分子引起形成的原始黏聚力和土中化合物的胶结作用形成的固化黏聚力，所以是抗剪强度的力学指标。

听力题

根据短文内容及首字母提示,填写所缺单词

In the 1930s, Dan West was farming in Spain.  It was wartime, and people were starving (挨饿). An i小题1: hit him

as he handed out cups of milk to children. “These children don’t need a cup.  They need a cow.” This was the b  小题2: of Heifer International. Heifer International gives different k 小题3:  of gifts.  Its gifts might

say “quack” or “moo”.  Dan West asked friends in the United States to give gifts of heifers(小母牛), or young cows.  S小题4: then, Heifer International has given animals to four million families.  It gives people the chance to f  小题5:   themselves.

Heifers International wants the people they help to help others.  For one project, the group s 小题6:  chickens to some children in Asia.  The children yearned for(向往) the day when they could help others.  Nine-year-old Julie knew she had to look after her chickens w 小题7:  so they would produce new eggs and healthy chicks.  She t 小题8:  good care of them, and they gave birth to strong, healthy chicks.  Julie then passed on the gift of chicks to other families.

Because of Heifer International, children can s 小题9:  their days in a schoolhouse instead of working in the fields.  They can use the money they earn from their animals to pay for school.  Heifer International has made a huge d 小题10:  to people’s lives for many years.  People should be grateful to a kindhearted farmer named Dan West.
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单项选择题

( )是准确度低于计量标准的，用于检定其他计量标准或工作计量器具的计量器具。

A．工作计量器具

B．工作标准器具

C．计量基准器具

D．计量标准器具
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