问题 选择题

(2010·辽宁鞍山,7)厨房炒青菜时,油锅过热着火,下列灭火措施适宜的是

A.加少量水

B.倒掉油

C.倒人大量菜

D.撒上沙子

答案

答案:C

A、油的密度比小,加少量水后,油会漂浮于水面上,与氧气的接触面积更大,更容易燃烧,故A措施不适宜;

B、把油倒掉也会燃烧,达不到灭火的目的,故B措施不适宜;

C、倒入大量的菜可以降低油的温度,使温度低于着火点,所以可以达到灭火的目的,故C措施适宜;

D、撒上沙子可以达到灭火的目的,但是这不是合适的方法,毕竟油的量是有限的并且我们是在炒菜呀,所以没有必要倒入沙子来灭火,故D措施不适宜.

故选C.

选择题
单项选择题

When Dave was eighteen, he bought a secondhand car for 200 so that he could travel to and from work more (1) than by bus. It worked quite well for a few years, but then it got so old, and it was costing him (2) much in repairs that he decided that he had better (3) it.

He asked among his friends to see if anyone was particularly (4) to buy a cheap car, but they all knew that it was falling to pieces, so (5) of them had any desire to buy it. Dave’s friend Sam saw that he was (6) when they met one evening, and said, "What’s (7) , Dave"

Dave told him, and Sam answered, "Well, what about advertising it in the paper You may (8) more for it that way than the cost of the advertisement!" Thinking that Sam’s (9) was sensible, he put an advertisement in an evening paper, which read "For sale: small car, (10) very little petrol, only two owners. Bargain at 50. " For two days after the advertisement first appeared, there was no (11) . But then on Saturday evening he had an enquiry. A man rang up and said he would like to (12) him about the car. "All right, " Dave said, feeling happy. He asked the man whether ten o’clock the next morning would be (13) or not. "Fine, " the man said, "and I’ll (14) my wife. We intend to go for a ride in it to (15) it. "

The next morning, at a quarter to ten, Dave parked the car in the square outside his front door, (16) to wait there for the people who had (17) his advertisement. Even Dave had to (18) that the car really looked like a wreck. Then, soon after he had got the car as clean (19) it could be, a police car stopped just behind him and a policeman got out. He looked at Dave’s car and then said, "Have you reported this (20) to us yet, sir\

19()

A. as

B. that

C. so

D. such