Question

　　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 shown here．It shows the time at the top of the panel．Under the time are the different functions(功能)．You can press(按)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 automatically(自动的)cook on HIGH(power level 10)unless you enter a lower power level．Suppose(假设)you want to cook a serving of broccoli for two minutes and forty-five seconds on MEDIUM power(level 5)．First, press the numbers 2, 4 and 5(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 over again．(from www.zkenglish.com)

阅读短文，然后根据其内容回答下列问题。

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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Answer 1

答案：
解析：

1．It tells us how to use a new microwave oven。由文首的“Before you use your new microwave oven, read the instructions carefully”，可以得到本文的主旨是“讲述微波炉的使用方法”。 　　2．Defrost, cook or warm food。短文末句的“Under the time are the different functions(功能)．You can press(按)Defrost, Cook, Clock, or Power．You can also warm food by pressing Reheat Times．”这句话是答案的出处。 　　3．First, press the number 2, 3, and 0．Then press Power．Next press the number 7．Finally press Start to begin cooking．由短文中的“Suppose(假设)you want to cook a serving of broccoli for two minutes and forty-five seconds on MEDIUM power(level 5)．First, press the numbers 2, 4 and 5(two minutes, forty-five seconds)．Then press Power．Next, press the number 5．”可以知道若是需要两分钟四十秒的时间来做菜的话，则是这样来操作。由此可知要是做豆角的话，需要用时两分钟三十秒，则应按2，3，0这三个钮。再根据前面的说明，可不难找到答案。 　　4．Start．由“Under the numbers are and Clear．”和“At last, press Start to begin cooking．”可知这是答案的出处。 　　5．It will clear the display and allow you to start over again．这是文章最后讲的一层意思，答案即在“If you make a mistake, press Clear．This will clear the display and allow you to start over again．”一句中。 　　这篇科学说明文浅显的文字，介绍了微波炉的构造并详细讲述了它的操作使用方法。