碗扣式钢管脚手架采用每隔06m设l套碗扣接头的定型立杆和两端焊有接头的定型横杆,并实现杆件的系列标准化。()
参考答案:对
— It's 8 o'clock in the evening. What's your uncle doing?
— I think he ____ TV.[ ]
A. watch
B. watches
C. watching
D. is watching
寰椎骨折的病因病理错误的是:()
A.头颈部扭挫伤所致
B.一般不会损伤脊髓
C.可合并齿状突骨折致脱位
D.脱位者可导致四肢瘫痪
E.严重者立即死亡