急性阑尾炎最常见的症状是
A．肠功能紊乱B．发热C．腹痛D．腰痛E．呕吐
参考答案：C
Modern science has given clear evidence ____ smoking can lead to many diseases. [ ]
A. what
B. which
C. that
D. where
在正常状态下，BCWP、BCWS、ACWP三条线应该是（）关系
