冷冲模具的主要的损坏形式是()
A、崩刃
B、断裂
C、变形
D、磨损
参考答案:D
After the age of 50 people often _____ their individual ambitions. [ ]
A. desert
B. give in
C. give away
D. abandon
既能清热凉血,又能活血的药物是()。
A.生地黄
B.牡丹皮
C.玄参
D.赤芍
E.紫草