干扰电属于（） A.低频电疗法 B.中频电疗法 C.高频电疗法 D.低中频电流 E.

根据短文内容，判断下列句子是否正确，对的涂（A），错的涂（B）。

Cats are the most popular pets among Americans. So it is not surprising there are many expressions about cats. Do you know any of them? Now let me introduce some to you.

Some cats like to catch small birds, like canaries. If someone looks very proud or satisfied with himself, we say he looks like the cat that ate the canary.

Sometimes, a cat likes to play with a small animal it catches. So if you play cat and mouse with someone, you change between different kinds of behavior when dealing with another person. For example, a child might offer something sweet to her little brother, and then take it away when reaches for it.

A cat will often catch a small animal and present it to its owner. The saying “that looks like something the cat dragged in (把…拖进来)” describes something in bad condition.

A fat cat is a person with a lot of money.

There are many other expressions about cats in America. How interesting! Which kind of cat are you, or which kind would you like to be?

小题1:Americans don’t like cats as pets very much.

小题2:The canary is a kind of bird.

小题3:If you have much money, we can call you a sad cat.

小题4:We can say he looks like the cat that ate the canary if someone is very pleased with himself.

小题5:The passage introduces us four expressions about cats.

看电视时，人们可以通过遥控器发出的______ （选填“红外线”或“紫外线”）来调控电视机．小明家其它用电器关闭，只有电视机工作2min时，他家标有3000r/（kW•h）的电能表铝制圆盘转了20r，则电视机实际功率是______W．

圆的周长公式是______或______，圆的面积公式是______，半圆形的周长公式______，圆周长的一半公式是______．

周某购买了一套已装修的建筑面积为160m²的商品住宅，总计房价款为80万元，首付款30%，贷款期限25年，贷款年利率为4.8%。

贷款银行要求周某10年还清贷款，经申请批准，住房置业担保公司为周某提供担保。此时除了周某须与贷款银行就个人住房贷款签订书面合同外，担保公司应与银行签订（）。

A.书面保证合同

B.书面主合同

C.书面借款合同

D.反担保合同

使用测微轮式的仪器读数前，先转动测微轮，使度盘分划线精确地平分双指标线，度数和整30`在（）上读出，不是30`的零分数和秒数在（）上读出。