超筋梁的极限弯矩（）
A.与配筋率及混凝土等级无关
B.基本上与配筋率无关
C.基本上与混凝土等级无关
D.与配筋率及混凝土等级有关
参考答案：B
Mr. Black comes from America, and he has studied Chinese in China for 5 years.
So you can talk with him____.[ ]
A.either in English or in Chinese
B.not in Chinese but in English
C.just in English not in Chines
D.neither in Chinese nor in English
试述植物种子萌发的三个阶段以及各阶段的代谢特点？
