Beijing is very and .[ ]
A. beautiful, young
B. so, great
C. old, beautiful
答案:C
正在滑动的土坡,滑动带为粘性土,宜采用的剪切试验方法为:()
A.多次剪
B.快剪
C.慢剪
设,问下列叙述错误的有()个。
(1)AB=BA; (2)(A+B)2=A2+2AB+B2;
(3)(A+B)(A-B)=A2-B2.
A.0
B.1
C.2
D.3