发油系统应设2级过滤装置，泵前过滤器过滤精度不小于（） A.30目 B.40目 C.

在短文的空格内填入适当的词，使其内容通顺，每空格限填一词，首字母已给。

     Reading books is a good hobby for all kinds of reasons.

     First, reading books is f   1   . You can always keep yourself amused if you like reading. This is especially

useful when the weather is bad. It is a relaxing hobby too. You can really become lost in a book.

     Next, you can read a book a  2   : in a car, in a waiting-room, on a plane, in bed - even in the bath. All you

need is a book! Reading is a convenient hobby as it is easy to stop and then start again.

      A  3    good reason for reading books is that it is useful. If you read as a hobby you will get better and

better at it. This m   4    that you will read faster and will become better at understanding what you read. As

your reading improves, you will probably find your schoolwork becomes much e   5   . Many school subjects

depend on good reading and, as you read, you learn more and more.

     Some people say that reading is out of date. This is not true. You have to be able to read to use a computer

and, the better you read, the better your computer skills will be. Reading is n   6    out of date!

      Good readers are most likely to be good writers, too. They are usually good at spelling as well, and have

more things to write about. Reading books is a wonderful hobby, one of the best.W   7    other hobby could

be more useful, or more enjoyable?

1._____ 2._____ 3._____ 4._____ 5._____ 6._____ 7._____

任何一个关节的运动都需要两块以上的肌肉协同作用。[ ]

项目经理进行全过程控制的关键是( )。

A．对信息进行有效的控制

B．对费用进行有效的控制

C．对质量进行有效的控制

D．对团队成员进行有效的控制

MRI与CT相比，下述颅脑成像优点中，哪项不对（）

A.无辐射损伤 

B.颅内病变定位、定性价值高 

C.直接多方位成像 

D.对中颅窝底、后颅窝病变价值高 

E.对钙化、急性出血敏感

腐蚀集中在较小范围，腐蚀深度较大属于（）。

A、均匀腐蚀

B、局部腐蚀

C、点腐蚀

D、选择性腐蚀