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问题 单项选择题

下列晚发型矽肺发生的条件中哪项是错误的

A．接尘浓度高
B．粉尘中的游离SiO2含量高
C．接尘年限短
D．脱尘时X线胸片未见明显异常
E．接尘者身体比较虚弱

答案

参考答案：E

填空题

-2的相反数是______；-4的倒数是______；绝对值等于3的数是______．
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听力题

根据短文内容及首字母提示，填写所缺单词，使短文意思完整。每空限一词。

Nogoba was a cavegirl. She lived in a cave with about 40 other people. Cavepeople lived in big groups to help each other. Their l    1     were very dangerous. There were many w   2

animals near the caves — lions, tigers, bears and elephants.

The cavemen hunted. They k    3   the animals for food. The children’s jobs were dangerous, too. Nogoba and her friends went to the river every day to get w   4   . Sometimes, the river was very deep. S    5   , there were animals near the river.

For many months of the y    6   , Nogoba was cold. There was ice and snow everywhere. It was difficult to be w    7  . The children sometimes went to sleep by the fire. Sometimes they were too n    8   the fire.

Sometimes Nogoba and her friends went to f    9     fruit and nuts to eat. Sometimes the fruit and nuts were poisonous and everyone became i   10  . There weren’t any cave doctors or cave hospitals!
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