在内河航行的（）总吨以上的油轮和（）总吨以上的非油轮，必须持_爱下问搜题

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问题单项选择题

在内河航行的（）总吨以上的油轮和（）总吨以上的非油轮，必须持有油类记录簿。（）

A.100、150

B.150、250

C.150、400

D.200、400

答案

参考答案：C

完形填空

完形填空。

                                          How 3D Movies Work   .
     Do you know 3D movies? When you see one, it's like the story  l in front of you, and you are a part ofit. 3D movies are exciting to   2   , but do you
know how3      them, and     4   you need to wear a pair of 3D glasses? To
understand these questions, let's make an easy   5  .
     O Put a finger   6   your eyes.
     O Cover your lef't eye and look at the finger.
     O Cover your right eye and look at the finger.
     What do you see:l The finger you see with your left eye is in a different
position from the one you see with your right eye. This means you get two
images(图像) when you look at   7     _ with both your eyes. To makea 3D
movie, people have to get two images at the same time,   8_ they use two
video cameras.  When playing a 3D movie, they use two projectors (放机)
at the same time.  This brings two images together on the screen. Then, we
use 3D glasses to separate(识别) the two images. One image enters one eye
and   9 enters the other eye.
     Then our brains   10     the two images together. In this way, we get 3D
pictures.

( )1. A. happen
( )2. A. watch
( )3. A. make
( )4. A. when
( )5. A. examl)le
( )6. A. in front of
( )7. A. everything
( )8. A. because
( )9. A. other
( )10.A. let

B. happened
B. see
B. to make
B. why
B, picture
B. in the front of
B. anything
B. so
B. the other
B. put

C. to happen
C. look
C. making
C. which
C. experiment
C. behind
C. something
C. and
C. others
C. take

D. happening
D. notice
D. made
D. what .
D. mowe
D. beside
D. nothing
D. but
D. the others
D. bring

问答题简答题

感应式电能表满载快，调整不过来有何原因？