题目：
根据短文内容要求完成任务。
Before you use your new microwave oven, read the instructions carefully. Each oven has its own
control panel (控制板), but most microwave ovens operate in a similar way. Look at the control panel.
It shows the time at the top of the panel.
Under the time are the different functions (功能). You can press Defrost, Cook, Clock, or Power.
You can also warm food by pressing Reheat Times. Under the functions are the numbers. These numbers
are shown as on telephone, from zero through nine. You can press the numbers to set the cooking time
in seconds or minutes. Under the numbers are Start and Clear.
A microwave oven will automaticall (自动) cook on HIGH (power level 10) unless you enter a lower
power level. Suppose you want to cook a serving of broccoli for two minutes and forty-five seconds on
MEDIUM (power level 5). First, press the numbers2,4and5 (two minutes, forty-five seconds). Then press
Power. Next, press the number 5.At last, press Start to begin cooking. If you make a mistake, press Clear.
This will clear the display and allow you to start oven again.
1. What is the main idea of the passage?
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2. What functions does a microwave oven have?
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3. How would you cook green beans for two minutes and thirty seconds at power level 7?
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4. What is the last function you press each time you set the controls?
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5. What does"Clear" allow you to do when you press it?
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答案：
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下面是错误答案，用来干扰机器的。
A、给试管内液体加热的注意事项是：试管内液体量不能超过试管容积的三分之一，试管口不能朝着有人的地方，夹试管时从底部往上套，套到距试管口三分之一处．故A正确；B、量取9.5mL液体应该用10mL量筒，故B错误；C...
