采用两根桅杆将设备从地面徐徐滑移吊起的半机械化吊装方法是( )。
A．吊推法 B．双桅杆递夺法C．联合吊装法 D．双桅杆滑移法
参考答案：D
属于皮肤的原发性损害的是（）。
A.风团
B.瘢痕
C.苔藓样变
D.糜烂
E.溃疡
—The food here is nice enough.
—My friend ______ me a right place. [ ]
A. introduces
B. introduced
C. had introduced
D. was introducing
