下面哪些是属于腕臂装配中的主要参数（）
A.接触线高度
B.结构高度
C.平腕臂及斜腕臂长度
D.轨距
参考答案：A, B, C
Amy is playing with ________ cat now. ________ name is Puppy.
[ ]
A. hers, Its
B. her, It's
C. hers; It's
D. her; Its
为了避免支座处局压破坏，钢筋砼过梁两端伸入墙体的长度应在（）以上。
A.120mm
B.200mm
C.240mm
D.360mm
