泵送高度在50m以下时,泵送混凝土碎石的最大粒径与输送管的内径比宜为:( )
A. 1∶5
B. 1∶7
C. 1∶2.5
D. 1∶3
查看答案
Old age does more than _____ away our most cherished memories; it also seems to diminish our ability to imagine things.
A. put
B. break
C. steal
D. keep
I got ____ in the traffic jam, or I would have arrived earlier.
A. lost
B. sucked
C. stick
D. stuck
The consumer market is ____ with electronic goods.
A. compulsory
B. saturated
C. tropical
D. trivial
I will ____ my camera for your drill.
A. trade
B. account
C. apply
D. mistake