单滚筒采煤机滚筒的转向是向外回转。
参考答案：错
—Would you like hamburgers?
—No, thanks. I don’t want . [ ]
A. any, any
B. some, some
C. some, any
感染性病后可能使HIV的感染几率提高2到（）倍。
A.8
B.13
C.18
D.23
