危机已不再继续造成明显的损害到危机造成的损害均已得到较好解决的阶段属于危机发展阶段中的()
A.危机开始阶段
B.危机爆发阶段
C.危机持续阶段
D.危机解决阶段
参考答案:D
Because of his illness, he _____ the visit to Canada scheduled next week.
[ ]
A. carried out
B. suffered from
C. answered back
D. called off
铲杆子用什么材质钢制作为合适()。
A.15MnTi
B.Mn13
C.20Cr