(2013·福建毕业班质量检查)—What does PM 2.5 mean?—It's a professional ________ indicating the condition of air pollution.
#11739
A
term
B
item
C
number
D
mark
推荐题目
Everyone is encouraged to _____ something to those who suffered a great deal in the earthquake.
#13315
A
construct
B
connect
C
contribute
D
collect
It is sometimes of great _____ to explain to the patient what is happening.
#13888
A
technique
B
signal
C
importance
D
freedom
Joe Jones, the eldest of the eight children, had to ________ out of high school at the age of 16 to help his father on the farm.
#13475
A
leave
B
drop
C
fall
D
go
- What took you so long? - I got lost. I have no _______of direction.
#12276
A
sense
B
ability
C
knowledge
D
feeling
It's a common _______ for young people to pay a New Year's visit to their elders.
#13137
A
sense
B
practice
C
rule
D
scene