脱磷处理包耳轴中心距()。A、4150mm B、4400mm C、4800mm

题型:单项选择题

问题:

脱磷处理包耳轴中心距()。

A、4150mm

B、4400mm

C、4800mm

考点:铁水预处理铁水预处理题库
题型:单项选择题

Singapore, July 12-many people enjoy chewing(咀嚼) gum, but in 1992 Singapore decided to make it against the law. The government said that people were not careful about throwing away used gum. Instead, they dropped it on sidewalks and on the streets where it made a big mess. Chewing gum also got stuck in the doors of the underground trains so that the doors didn’t close properly. This meant the trains didn’t run on time. Singapore said that people had to give up chewing gum or pay a lot of money to the government. During the time without chewing gum, the streets and underground trains of Singapore were clean.

Now the government of Singapore is changing the rules a little. Some dentists say that chewing sugarless gum can help take care of people’s teeth. Now the government says that people will be able to buy special kinds of gum at drugstores for health reasons. Other kinds of gum are still not allowed.

根据短文内容, 判断正 (T)误(F)。

小题1:The text is probably taken from a story book..

小题2:Chewing gun made Singapore dirty before 1992.

小题3:During the time without chewing gun ,the streets and underground trains were clean.

小题4:People can buy special kinds of gun at the dentist’s for health reasons

小题5:Now in Singapore everyone can chew all kinds of gum freely.

题型:单项选择题

有人把森林称为天然氧吧,是因为(  )

A.绿荫遮挡太阳

B.蒸腾作用蒸腾水分

C.呼吸作用产生二氧化碳

D.光合作用产生氧气

题型:单项选择题

下列不能作为实名证件使用的是()。

A.护照

B.16周岁以上中国公民的户口簿

C.学生证

D.机动车驾驶证

题型:单项选择题

超声波熟化法是通过超声波作用加速酒中所含微量醇、醛、酯和烯类等物质的()、()、(),从而产生出各种复杂的新的香味物质,赋予酒以醇厚感和芳香味。

题型:单项选择题

2002年3月,“马可·波罗纪念钟楼”在中国泉州竣工剪彩。该钟楼是为了纪念700多年前的来华旅行家马可·波罗。这位旅行家是[ ]

A.希腊人

B.意大利人

C.日本人

D.朝鲜人

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