车站停电后屏蔽门系统能保证正常工作（）分钟，开关门3次。
参考答案：30
写出同义句。
1. I go to China by plane.
I ____________ ____________ ____________ to China.
2. Let's take a bus to Yunnan.
Let's go to Yunnan ____________ ____________.
3. A train is faster than a bus.
A bus is ____________ ____________ a train.
4. What's the English for this?
What's ____________ ____________ English?
5. What's your age?
How ____________ are you?
香气暴香
