治疗胃热呕吐，宜选用的药物是（）
A.黄芩
B.黄柏
C.黄连
D.龙胆草
E.苦参
参考答案：C
为了方便救援，每个电梯管理者都必须配备电梯钥匙及层门三角钥匙.（)
Your body language _____ your real emotion. [ ]
A. gave in
B. gave up
C. gave away
D. gave out
