物流检测器发射的波是()。
A.微波
B.声波
C.超声波
D.光波
参考答案:A
Mrs Black is _____ with the girls. They're _____ friends. [ ]
A. well, well
B. good; good
C. well, good
D. good; well
腰麻时有关血压的描述哪项是正确的()
A.脊麻平面在T以上者,血压约下降14%
B.在T以下者下降21%
C.肺动脉压下降35%~50%
D.全身静脉压下降4%~10%
E.左房压下降15%~35%