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It was time for a haircut. Lenny didn't even have to look in the mirror. Even though he was going bald, he knew that he needed to cut his hair every two weeks. He had a tongue of hair on the top of his head. His hair was tinning at the crown. He still had plenty of hair on the sides and back. It was what they call “salt and pepper", a mixture of gray hair and dark brown hair. It was only a few years, he figured, until the salt and pepper became just salt. He never let his hair grow for more than two weeks. The longer it got, the worse it looked, he thought. He spread a newspaper over the bathroom sink so that no hair went down the drain. He plugged in the clippers and started cutting his hair. He started at the back of his head, went to the sides, and finished on the top. Every minute or so, he had to clean the hair out of the blades with an old toothbrush. Finished, he picked up a hand mirror to check out the back of his head. Everything looked okay. He carried the newspaper back out to the kitchen and shook the hair clippings into the trash can. Then he took a shower.
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【单选题】下列有关气体的制备与收集方法中,不正确的是(  )
A.
二氧化碳既可以用排水法收集,又可以用向上排空气法收集
B.
制备气体时,一定要先检验气密性
C.
密度比空气小,且不溶于水的气体,既可用向下排空气法又可用排水法收集
D.
一氧化碳只能用排水法收集
【简答题】请列举三个创业企业的代表人物?
【单选题】气质类型中多血质的主要行为特征是()
A.
缓慢稳重
B.
小心迟疑
C.
精力充沛
D.
胆量较大
【单选题】根据我国宪法和有关规定,审计署应设副审计长( )人。
A.
B.
C.
D.
若干
【简答题】为什么不能采用伏特表测定原电池电动势?
【单选题】物流信息按其环节可分为输入物流活动的信息和( )。
A.
协调控制信息
B.
决策支持信息
C.
物流活动产生的信息
D.
加工信息
【简答题】下列气体中,既能用排水取气法又能用向上排空气法收集的气体是 A.氧气 B.氢气 C.二氧化碳 D.甲烷 标准状况下密度 1.429克/升 0.089克/升 1.978克/升 0.714克/升 在水中的溶解性 不易溶于水 难溶于水 能溶于水 难溶于水 A.氧气 B.氢气 C.二氧化碳 D.甲烷
【单选题】下列属于C语言合法关键字的是( )。
A.
Float
B.
float
C.
integer
D.
Char
【简答题】气质类型中多血质的主要行为特征是()。
【单选题】物流信息按其环节可分为输入物流活动的信息和( )。
A.
物流活动产生的信息
B.
加工信息
C.
决策支持信息
D.
协调控制信息
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