节气门全开时的负荷特性叫发动机外特性。

题型:判断题

问题:

节气门全开时的负荷特性叫发动机外特性。

考点:机动车维修技术发动机结构与检修发动机结构与检修题库
题型:判断题

阅读理解。

     Wang Tao is a young worker . He works in a big company ( 公司).He gets up at twenty past six

every morning .He often has breakfast at seven o'clock .And then he goes to the company by bus . He

begins to clean the machines (机器) when he gets to the company. Wang Tao goes home at four thirty .

When he gets home,he usually does the housework first .After supper ,he reads books. Sometimes he

tells his father and mother something about his company. Sometimes he watches TV with them . He goes

to bed at about ten o'clock.

1. Wang Tao is ___________________________________.

2. Wang Tao gets to the company and ___________________________________.

3. After he gets home ,he usually ___________________________________first .

4. After supper, ___________________________________,sometimes he tells his parents something

about his company .

5. Wang Tao lives with ___________________________________.

题型:判断题

在对肝癌患者行肝叶切除术时至少要保留()。

A.正常肝组织的40%或肝硬化肝组织的40%

B.正常肝组织的30%或肝硬化肝组织的50%

C.正常肝组织的20%或肝硬化肝组织的30%

D.正常肝组织的50%或肝硬化肝组织的50%

E.正常肝组织的60%或肝硬化肝组织的60%

题型:判断题

关于牙酸蚀症说法不正确的是()

A.主要指职业性牙酸蚀症

B.有时会发生细菌感染

C.可使用含氟牙膏刷牙以预防

D.造成酸蚀症的酸包括内源性酸和外源性酸

E.与夜间饮用酸性饮料后是否漱口、刷牙明显有关

题型:判断题

下列哪个结构不构成肝脏的脏面H状结构()

A.门静脉

B.下腔静脉

C.肝圆韧带

D.静脉韧带

E.肝左静脉

题型:判断题

电子束加热速度快,淬火组织很细,可以得到细针状马氏体、隐晶马氏体,甚至超细化组织,因此电子束淬火一般()

A.需要在24h内回火

B.需要在4h内

C.需要立即回火

D.不需要回火

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