蓝液压系统工作，在放起落架之前，飞行操纵法则为：（）.
A.备用法则
B.正常法则
C.直接法则
参考答案：A
情景选择，将正确答案的序号填入题前括号里。
1. 假如你是商店营业员，顾客进店后，你应说：[ ]
A. Thank you.
B. Can I help you?
C. Good job!
2. 你想和Mike交朋友，你对他说：[ ]
A. Let's make friends.
B. We are friends.
C. A friend?
3. 你想让陈洁把勺子递过来，你对她说：[ ]
A. Show me your spoon.
B. Pass me the knife.
C Pass me the spoon.
4. 睡觉前，我们应先到____________洗漱一下。[ ]
A. study
B. bedroom
C. bathroom
5. 当别人请你再吃些东西，可你已经吃饱了时，你说：[ ]
A. No, thanks. I'm full.
B. Thank you.
C. Great!
(66) is a device that converts images to digital format．
A．Copier
B．Printer
C．Scanner
D．Display
