不属于活塞式压缩机气缸内部润滑功能的是()。 A.减少气缸、活塞环等的磨损 B.压缩

题型:单项选择题

问题:

不属于活塞式压缩机气缸内部润滑功能的是()。

A.减少气缸、活塞环等的磨损

B.压缩气体的密封

C.各部件的防锈、防蚀

D.压缩气体的冷却降温

考点:压缩机工考试初级压缩机工初级压缩机工题库
题型:单项选择题

下列有关高等植物光合作用和细胞呼吸的叙述中,正确的有[ ]

A.光合作用合成的糖类可以在细胞呼吸中被利用

B.光合作用和细胞呼吸均需要水参加

C.光合作用和细胞呼吸分别在叶肉细胞和根细胞中进行

D.光合作用光反应产生的ATP全部用于细胞呼吸

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男性,25岁,喜好网球运动,右肘关节外侧疼痛1个月,加重3天,持物无力,拧毛巾痛。体格检查:除右肘关节外侧局限性压痛外,下列哪项试验最有助于诊断()

A.Gaenslen

B.Mills

C.Froment

D.Finkelstein

E.Dugas

题型:单项选择题

某企业销售甲产品的单价为200元/台,单位变动成本为80元,固定成本240000元,甲产品盈亏平衡点的销售量为( )。

A.3000台

B.2500台

C.2000台

D.2200台

题型:单项选择题

Imagine going to sleep then waking up speaking another language. It may sound impossible, but it's actually happened.

The phenomenon(现象)of being able to suddenly speak another language is known as“Xenoglossia”, from the Greek words“xenos”(foreigner)and “glossa”(language).

It once happened to a 13­year­old girl from Croatia. After being unconscious(不省人事的)because of a disease for 24 hours in 2010,she woke up speaking fluent German. The girl, who came from the town of Knin in the south of Croatia,was studying German at school but she'd only started recently. Her parents said that she'd been reading German books and watching German TV at home, but that she wasn't fluent in the language.However ,since waking up, she's been able to communicate “perfectly”in German.What's really strange is that she's now unable to speak Croat,her mother language.Doctors at Split's KB Hospital have asked some experts to examine the girl as they try to find out what caused the change.Dr Mijo Milas said,“In earlier times this would have been considered as a miracle(奇迹);we prefer to think that there must be an explanation—it's just that we haven't found it yet.”

In 2007,Matej Kus from Czech became unconscious after a motorbike accident. On waking up 45 minutes later,he could speak fluent English.Matej was only 18 years old at the time, and had just started studying the language and so was at a low level.Peter Waite,Kus's teammate said,“I couldn't believe what I was hearing.It was really clear English.It was unbelievable to hear him talk in unbroken English.”Unluckily,Matej's new language skills didn't last.Two days later, when he recovered fully from the accident, he'd completely forgotten his English.

We still don't know exactly what happened to the two people. Perhaps scientists will discover something new and exciting. But until then, keep studying!

小题1:According to the passage,what is“Xenoglossia”?

A.That someone becomes unconscious.

B.That someone speaks a new language in a sudden.

C.That someone doesn't like his mother language.

D.That someone is able to speak Greek suddenly.小题2:What does the underlined word “It” in Para.3 probably refer to?

A.Having accidents.

B.Speaking fluent German.

C.The phenomenon of Xenoglossia.

D.Being unable to speak.小题3:We can learn from Paragraph 3 that the girl from Croatia ______.

A.wanted to know what caused her change

B.believed she had a talent for language

C.didn't study German for a long time

D.didn't like learning German小题4:Which of the following is TURE according to the test?

A.Matej Kus is now afraid of motorbike racing.

B.The girl from Croatia lost consciousness for several days.

C.The girl from Croatia was knocked unconscious in an accident.

D.Matej Kus could only speak a little English before the accident .

题型:单项选择题

在粉末涂装法中,最有发展前途的是()。

A.流化床涂装法

B.静电喷涂法

C.静电流化床法

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