旋覆代赭汤证的临床必见之症是()
A.心下痞硬
B.噫气不除
C.干噫食臭
D.腹中雷鸣
E.下利频作
参考答案:A, B
The girl in the classroom ______ be Maria. She called me from the library just now.
A.mustn't
B.may not
C.can't
D.needn't
长度相同、粗细不同的导体,按如图所示连入电路中,通过甲、乙导体的电流分别为I1和I2,则它们的关系是I1 _________ I2(填“>、<、=”).