机房的温度应在不低于（），不高于40℃.A.0℃ B.5℃ C.7℃ D.10℃
题型：单项选择题
问题：
机房的温度应在不低于（），不高于40℃.
A.0℃
B.5℃
C.7℃
D.10℃
题型：单项选择题
根据图片，选择正确答案。
1. Tom sends nine postcards to his _____________ 
.[ ]
A. brother
B. mother
C. father
2. Where do I put the _____________ 
?[ ]
A. stamp
B. envelope
C. letter
3. Where is Jeff sending his _____________ 
?[ ]
A. postcard
B. e-mail
C. letter
4. I write the address on the _____________ 
of the postcard. [ ]
A. left
B. right
C. corner
5. This is an _____________ 
from your friend. [ ]
A. e-mail
B. letter
C. postcard
