问题
选择题
Daming often runs _____ the morning, but _____ Sunday morning he doesn't. [ ]
A. in; in
B. in; on
C. on; in
D. on; on
答案
答案：B
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Daming often runs _____ the morning, but _____ Sunday morning he doesn't. [ ]
A. in; in
B. in; on
C. on; in
D. on; on
答案：B
。单排钢筋，
；双排钢筋，
=70mm。
