问题 选择题

下列不是压强单位的是(  )

A.Pa

B.N/m2

C.kg

D.kPa

答案

A、B、若物体1m2面积上受到的压力为1N,则物体受到的压强:

p=

F
s
=
1N
1m2
=1N/m2=1Pa,可见N/m2、Pa都是压强的单位,A、B不符合题意,故A、B错;

C、kg是质量的单位,符合题意,故C正确;

D、kPa是生活中压强的另一个单位,1kPa=103Pa,不符合题意,故D错.

故选C.

完形填空

Henry works in a factory. He likes to watch         matches very much and spends much time         it.

One evening, there was a big football match on the playground. He went there at once after work. There         a lot of people there. And all the tickets were sold out(卖完). He was sorry for it. He saw a pole(电线杆)outside the playground and         it up quickly. A policeman came and said, “It’s         to stay on it! Come down!”

Just at that time, the policeman heard cheers on the playground and asked in a hurry, “Which team         a goal?”

“Ours!”

“Wonderful! You can stay there. Be careful!”

The policeman said happily and left.         the match would soon be over, he came back again and asked, “Who is        ?”

“Theirs, 3-2.”

“Come down,” the policeman said        , “such a match isn’t worth(值得)watching!”

Henry         come down. But soon they heard cheers again. The policeman said in a hurry, “Climb up quickly and see who’s kicked a goal!”

小题1:A. basketball              B. football         C. baseball

小题2:A. in                      B. on               C. to

小题3:A. had                    B. was              C. were

小题4:A. climbed                B. looked               C. put

小题5:A. interesting             B. easy           C. dangerous

小题6:A. kicked                  B. passed               C. threw

小题7:A. Until                   B. When             C. After

小题8:A. playing                B. missing          C. winning

小题9:A. angrily                 B. happily          C. luckily

小题10:A. wished to              B. had to               C. liked to

单项选择题