曲马多属于
A．双氯芬酸钠B．哌替啶C．美沙酮D．异丙肾上腺素E．右丙氧芬
参考答案：E
腹痛肠鸣，呕吐泄泻可见于
A．风淫证候
B．寒淫证候
C．暑淫证候
D．湿淫证候
E．火淫证候
Mr Chen told us that three fourths of the earth ________covered with water.
A．were
B．is
C．was
D．are
