A phenomenon emerges that an increasing number of on-job people, especially those in their
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What does the police investigation reveal about the case？
A. The latest case might be drug-related.
B. The killing might have happened during a robbery.
C. Police officers are more dangerous than civilians.
D. The local police force is not powerful enough.
How many people were killed in the Southern Oaxaca state？
A. 5.
B. 8.
C. 13.
D. 19.
Whats the problem of space shuttle Discovery？
A. The space shuttle can"t reenter the earth"s atmosphere.
B. The space shuttle and its crew demised.
C. The fuel tank leaks oil.
D. There"s the possibility that ice chunks might fall off the shuttle"s fuel tank.
电绝缘服保存时，不要挤压和折叠，可以放在()，暖气等热源的附近，可以直接暴漏于阳光，人工光源或臭氧源环境中。
A. 蒸汽管道
B. 排风管道
C. 计算机网线
D. 电话线
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