导致肺炎的非典型病原体是（）
A.肺炎链球菌
B.军团菌
C.葡萄球菌
D.肺炎克雷白杆菌
E.铜绿假单胞菌
参考答案：B
—Why are you standing there, Maggie —I can't see the blackboard clearly. Two tall boys are sitting ______ me.
A. behind B. in front of C. beside D. next to
叶片式空气流量计属于（）传感器。
A.有源
B.电阻式
C.电感式
D.电容式
