腰麻时血压下降的主要原因（）
A.心动徐缓
B.术前脱水
C.交感神经节前纤维阻滞
D.肌张力下降
E.副交感神经阻滞
参考答案：C
—He has a lot of friends who have a lot in________ common with himself.
—Indeed. Birds of ________ feather flock together.
A．the, \
B．the, a
C．\, a
D．a, the
Which of the following signs or symptoms would lead the nurse to suspect that a 10-year-old child is experiencing early salicylate toxicity
A．Chest pain.
B．Pink-colored urine.
C．Slowed pulse rate.
D．Dizziness.
