红外线探测器分为主动红外和被动红外两大类。_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题判断题

红外线探测器分为主动红外和被动红外两大类。

答案

参考答案：对

填空题

完形填空。

       This is   1     House of Noodles. we have    2   great  specials. One     3    of  noodles     4     beef,
carrots and potatoes and onions. Special 2 is only 3. 5 RMB,   5 has mutton, cabbage and potatoes.
The    6 kind of noodles has chicken, broccoli and carrots. Many kinds   7   drinks are  waiting      8
you. Each drink only costs 2 yuan. We have     9    sizes of bowls: small, medium and large. Come and
   10    your noodles today. You can call 834-6688.

( )1. A. we
( )2. A. some
( )3. A. size
( )4. A. have
( )5. A. and
( )6. A. first
( )7. A. at
( )8. A. three
( )9. A. three
( )10.A. coo

B. our
B. any
B. /
B. is
B. but
B. second
B. with
B. for
B. many
B. get

C. me
C. a little
C. kind
C. are
C. then
C. /
C. of
C. to
C. third
C. drink

D. I
D. much
D. bowl
D. has
D. or
D. last
D. for
D. on
D. any
D. do

填空题

凡是能使人体、金属或其它物质发生腐蚀作用的气体，均被称为（）。