轴向式变流量柱塞泵能够根据系统需求自动调节输出流量的原理是它能够根据泵的：（）.A.

发布时间：2020-01-23 05:33 │ 来源：www.tikuol.com

题型：单项选择题

问题：

轴向式变流量柱塞泵能够根据系统需求自动调节输出流量的原理是它能够根据泵的：（）.

A.进口压力自动调节驱动轴转速，从而调节柱塞往复运动的速度

B.进口压力自动调节斜盘倾角，从而调节柱塞往复移动的行程

C.出口压力自动调节驱动轴转速，从而调节柱塞往复运动的速度

D.出口压力自动调节斜盘倾角，从而调节柱塞往复移动的行程

考点：民用航空器维修执照考试 M15活塞式发动机 M15活塞式发动机题库

题型：单项选择题

阅读下面短文，从所给单词中选出适当的词，并用其正确的语言形式填在标有题号的空白处，使语意通顺、完整。（每空一词且每个单词只能用一次）

omething, write , when , gift , understand , member , birthday , lucky , easy , like , different , secret.

   If your birthday is coming, what presents will your parents buy for you? It's not  1.     For Chinese parents to choose a birthday present for their children . Many American parents also have the same problem .But 2.       they have got American girl -- an American company . It is famous for its beautiful dolls . Though there are many famous dolls in the world . American girl  dolls are becoming one of the most popular birthday  3.     for girls.
    What makes American girl dolls so popular among girls ? The    4.   is in her matching (相配的）hair , skin , eye colour , clothing and so on . That is to say , there are   5.     kinds of dolls for buyers to choose and the dolls look6.     their owners. The company hopes their dolls can make girls 7.     that it is OK to be different from others .
    The company gives each American girl doll her own name and special background . They also invite writers to  8.     books about her.the stories in the books are mainly about different periods of American history .So 9.       the girls
are playing with their dolls ,they can get a lot of fun and they can learn 10.       about history , too .

查看答案

题型：单项选择题

Though Jack has failed twice in _____ PE test, he decided to have _____ third try.

[ ]

A. the; the

B. a; the

C. a; a

D. the; a

查看答案

题型：单项选择题

属于阴经的络穴的是

A．列缺

B．偏历

C．通里

D．支正

E．公孙

查看答案

题型：单项选择题

踝管内行走的神经是：

A．桡神经
B．尺神经
C．正中神经
D．胫后神经
E．腓神经

查看答案

题型：单项选择题

蓄电池按浮充电方式运行时，每（）应进行一次核对性放电。

A、1个月

B、3个月

C、半年

D、一年

查看答案

更多题库