岩坡发生岩石崩塌破坏的坡度,一般认为是: ()
A.>45°
B.>60°
C.>75°
D.90°
参考答案:B
美育的主要任务包括,()、()、()和塑造完美人格。
单项选择。
She has 3 pens. One is new. are old. [ ]
A. the other
B. the others
C. other two
D. others