拱顶油罐一般用来储存()。A.汽油 B.柴油 C.甲醇 D.MTBE

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问题:

拱顶油罐一般用来储存()。

A.汽油

B.柴油

C.甲醇

D.MTBE

考点:石油化工设备知识考试石油化工设备知识考试题库
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SQL语句中,修改表中数据的短语是【 】,修改表结构的短语是【 】。

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People are having “Beautiful Guangxi Clean villages” activities in Guangxi. Make sure it can be done well, the Press Conference (新闻发布会) was held on May 3rd, 2013 in Guangxi. There will be something to do these days. First, the government will send many members to the villages. They will live in 1,4353 villages of Guangxi with villagers. A member of government will manage a village. Second, every village must have places to put litter. Third, villagers must put litter to the designated place. Don’t throw it here and there. Finally, the litter must be put away in time .

“Beautiful Guangxi Clean villages” is really hard and long work. If people do well, Guangxi will get more and more beautiful.

根据短文内容,判断下列句子正误。正确为“T”,错误为“F”,并在答题卡上把“T”或“F”涂黑。

小题1:The Press Conference was held on May 3rd, 2013 in Guangxi.

小题2:The government will send 1,4353 members to the villages.

小题3:Villages must put litter to the designated place.

小题4:“Beautiful Guangxi · Clean villages” isn’t hard and long work.

小题5:After the activities, Guangxi will become more and more beautiful .

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对羟基苯甲酸乙酯在明胶空心胶囊中作()

A.增塑剂

B.增稠剂

C.增光剂

D.遮光剂

E.防腐剂

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玻璃钢按材料的类型分是( )。

A.金属材料

B.有色金属材料

C.非金属材料

D.复合材料

题型:单项选择题

方程z2-x2-y2=0所表示的曲面是( )。

A.旋转双曲面
B.双叶双曲面
C.圆锥面
D.单叶双曲面

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