问题
单项选择题
一堆沙重480吨，用5辆载重相同的汽车运3次，完成了运输任务的25%，余下的沙由9辆同样的汽车来运，几次可以运完（）
A．4次
B．5次
C．6次
D．7次
答案
参考答案：B
解析：
本题主要考查工程的相关知识 [解题要点] 求出一辆汽车每次能运沙多少吨 由题意知，一辆汽车每次能运沙(吨)，则余下的沙用9辆汽车
(次)可以运完。故选B。
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一堆沙重480吨，用5辆载重相同的汽车运3次，完成了运输任务的25%，余下的沙由9辆同样的汽车来运，几次可以运完（）
A．4次
B．5次
C．6次
D．7次
参考答案：B
解析：
本题主要考查工程的相关知识 [解题要点] 求出一辆汽车每次能运沙多少吨 由题意知，一辆汽车每次能运沙(吨)，则余下的沙用9辆汽车(次)可以运完。故选B。
阅读短文，根据短文内容，从所给的六个选项中选出可以填入空白处的最佳逸项．使短文意思完整、连贯。(有两项为多余选项) ’  Thomas Edison’ s lab was badly’ destroyed by fire in December, 1914. 小题1: Much of Edison’ s life’ s work went up in flames (火焰) on that December night. After seeing the fire, Edison’ s 24-year-old son, Charles, looked for his father among the smoke. 小题2: Edison’ s face turned red and his white hair blew in the wind."I am happy that he is still alive," said Charles. "He is 67--no longer a young man—and everything is going up in flames. When he saw me, he shouted, " 小题3: " When Charles told him he didn’ t know, Edison said, “ Find her. 小题4: She will never see anything like this. " The next morning, Edison looked at the damage and said," There is great value in disaster (灾难). All our mistakes are burnt. We can start again. " Three weeks after the fire, Edison showed his first phonograph (留声机 ). To invent something, you need a good imagination and a lot of junk.
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