问题 填空题

昨天莉莉同学买了一台空调,上午安装完打开,空调正常工作.但到了晚上,在照明灯泡、洗衣机、微波炉、电磁炉等用电器正常工作时再开空调,电路中的保险丝却熔断了.电路中电流过大的原因是______.

答案

因为在照明灯泡、洗衣机、微波炉、电磁炉等用电器正常工作时,功率已经比较大,而空调属于大功率用电器,因此再使空调机接入家中电路后,保险丝熔断,说明电路中电流过大,其原因是用电器总功率过大造成的.

故答案为:接入电路的总功率过大.

阅读理解

阅读理解。

     Mrs. Tan was worried about her weight (重量)."I'm much too fat," she told her friend. "I need to lose a

lot of weight but I don't know how to do it."

    "Go and see Dr Wei," her friend said, "He'll tell you how to lose weight." Mrs. Tan visited Dr Wei and

told him her problem.

     "It isn't difficult to lose weight," he told her."All you need to do is to go on a diet (节食). I'll give you

one."He began to write on a piece of paper."Eat lots of fruit and vegetables. Also eat a lot of lean meat

(瘦肉) and grains (谷物)."

      When he finished, he handed her the piece of paper.

     "There you are," he said. "Eat all those things and you'll soon lose weights."

     A few weeks later, Mrs. Tan's friend called on her. She was surprised to see that she was even fatter

than before and that she was eating a large sandwich with chocolate cake and ice cream.

     "I thought you were on a diet," she said, "Oh, I am," Mrs. Tan answered. "I've already had all the food

on my diet today. Now I'm eating my dinner."

1. Mrs. Tan didn't know ________.

A. where her doctor was

B. what she could do

C. how she could lose weight

D. who could help her

2. Mrs. Tan wanted to lose weight because she had too much ________.

A. fat

B. weight

C. food

D. time

3. When Mrs. Tan visited Doctor Wei, he told her ________.

A. she must lose weight

B. she was too fat

C. what to buy

D. what to do

4. Mrs. Tan got even fatter because she ate ________.

A. fruits and vegetables

B. cakes and ice cream

C. lean meat

D. a lot of grains

5. From last sentence we know Mrs. Tan ________.

A. didn't understand the doctor at all

B. understood the doctor very well

C. didn't like the diet

D. loved to go on a diet

名词解释