中型叉车则多设为（）个档。
A.2~3
B.3~4
C.3~5
D.4~5
参考答案：B
It is reported that the _____ temperature is higher this year than that of last year. [ ]
A. actual
B. recent
C. average
D. regular
与回肠相比，空肠的解剖特点，下列哪项是错误的()
A．大部分位于左上腹
B．蠕动较活跃
C．肠腔相对较粗
D．粘膜常呈羽毛状
E．粘膜皱襞较少
