角膜是不透明的。_爱下问搜题

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问题判断题

角膜是不透明的。

答案

参考答案：错

完形填空

完形填空。

     Two days ago, I carried a few bags from my apartment to the car. After I
finished it, I went back  1 the apartment building. I went up to the second 2
very soon. I saw two boxes at the corner, but I remembered they weren’t
there  3 . Maybe someone just put them there while I was  4  the bags.
     I took out my key and tried to  5  the apartment door, but the key didn’t work. There were two key on the desk when I 6 the apartment. I just took 7 of them. Maybe I took the 8  one. They looked the same and that was quite 9  .
     When I was 10 again, a woman opened the door. She asked me if 11
needed any help, You could  12 how surprised I was. What was she doing in my apartment? Then I saw a new doorbell, and everything in the house
looked 13  .
     Then I realized that I had 14 into the wrong building. I said sorry to the  15 and left. Later I found that my apartment building was the one in front of it.

( )1． A．on
( )2． A．floor
( )3． A．ago
( )4． A．making
( )5． A．open
( )6． A．took care of
( )7． A．all
( )8． A．fight
( )9． A．possible
( )10．A．climbing
( )11．A．you
( )12．A．imagine
( )13．A．polite
( )14．A．copied
( )15．A．woman

B．for
B．class
B．before
B．buying
B．close
B．got out of
B．both
B．bright
B．careful
B．trying
B．he
B．look
B．poor
B．walked
B．child

C．into
C．house
C．after
C．lending
C．pick
C．looked out of
C．one
C．excellent
C．special
C．allowing
C．I
C．decide
C．true
C．flew
C．girl

D．from
D．room
D．now
D．carrying
D．cut
D．did well in
D．either
D．wrong
D．original
D．shouting
D．she
D．hear
D．different
D．rode
D．man

问答题

质量是158 g的空心铁球，体积为25 cm³，若给中空部分装满某种液体后，铁球与液体的总质量是162g，求装入中空部分液体的密度．（ρ_铁=7.9g/cm³）