Tom , you ____ play with the knife. You_

题型:选择题

问题:

Tom , you ____ play with the knife. You_____ hurt you. [      ]

A. won't; can't      

B. mustn't ; may    

C. shouldn't ; must    

D. can't ; shouldn't

考点:情态动词
题型:选择题

患者,女,60岁,初戴全口义齿,医师检查发现在正中接触时,咬合接触点少。

此现象诊断为

A.正中关系错误

B.正中接触不全

C.前伸干扰

D.侧方干扰

E.长正中不协调

题型:选择题

用动词的适当形式填空。

     Today, roller-skating is easy and fun. But a long time ago, it wasn't easy at all. Before 1750, the idea

of   1  (skate) didn't exist. That changed because of a man _2_(name) Joseph Merlin.

     One day Merlin received an invitation _3  (attend) a fancy dress ball. He was very pleased and a little

excited. As the day of the party came near, Merlin began to think how _4_(make) a grand entrance at

the party. He had an idea. He thought he _5_(get ) a lot of attention if he could skate into the room.

     Merlin _6_(try) different ways to make himself roll. Finally, he decided to put two wheels under each

shoe. These were the first roller skates. Merlin was very proud of his invention and dreamed of arriving

at the party on wheels while playing the violin.

     On the night of the party, Merlin rolled into the room _7_(play) the violin. Everyone was astonished

to see him. There _8  (be) just one problem. Merlin had no way to stop his roller skates. He rolled on

and on. Suddenly, he ran into a huge mirror that _9_(hang)on the wall. Down fell the mirror, breaking to

pieces. Nobody _10  (forget) Merlin?s grand entrance for a long time.

1.______ 2.______ 3.______ 4.______ 5.______

6.______ 7.______ 8.______ 9.______ 10.______

题型:选择题

偏磁电流

题型:选择题

在MGB1420万能磨床的工件电动机控制回路中,由晶闸管直流装置FD提供电动机M所需要的直流电源,()电源由U7、N两点引入。

A、24V

B、36V

C、110V

D、220V

题型:选择题

最易引起肝性脑病的疾病是

A.药物性肝炎

B.肝炎后肝硬化

C.酒精性肝硬化

D.血吸虫病引起的肝硬化

E.胆汁淤积性肝硬化

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