在行进过程中，当将左边的行走操纵杆置于中位，机器将向（）转弯。
A.左
B.右
C.前
D.后
参考答案：A
To work from home, which one could hardly imagine, has been made _____ with the development of
computer technology. [ ]
A. possible
B. it possible
C. possibly
D. to be possible
急性乳腺炎最常见的致病菌是（）
A.溶血性链球菌
B.肺炎球菌
C.白色葡萄球菌
D.厌氧菌
E.金黄色葡萄球菌
