运行中汽轮机突然关闭主汽门，发电机将变成（）_运行。A.同步电动机； B.异步电动机

阅读短文，把A—D四个句子填入文中空缺处，使短文内容完整正确，然后完成小题。（5分）
Computers can injure (伤害) you .Most other injures happen suddenly .___1___. Now learn to use a computer safely .
Too much light can be bad for you eyes , so never sit too close to a computer screen .___2___ . This gives your eyes a rest .
When we use a computer , the window should be on your left or your right . If it is behind you , the light will reflect ( 反射 )on the screen .That may hurt your eyes .
Hand and wrist ( 手腕 ) injures can happen because the hands and wrists are moved in the same way hundreds of times .__ 3___,stop sometimes and exercise your hands ,wrists and fingers in a different way .
If you sit in wrong way ,you can injure your back or your neck . ___4___. The top part of the screen should be in front of your eyes .

A. Remember to look away from it sometimes B .But computer injures happen slowly . C. So you should sit with your back straight.. D. If you use a keyboard for a long time .

Which of the following is WRONG according to the passage ?（     ）
A. When you use a computer , the window should be in front of you .
B. Computers ’injures happen slowly .
C. The top part of the screen should be in front of your eyes .
D. After using a computer for a long time ,you should exercise your hands ,wrists and so on.