胃脘胀痛，痛连胸胁，嗳气痛减，证属（）
A．气滞
B．痰饮
C．血虚
D．肺热
E．真心痛
参考答案：A
钢与铜及铜合金焊接时的主要问题是______。
Heroes are those who，given a choice between doing the right thing at great personal cost or the wrong thing for great personal benefit，＿＿＿＿the former.
A．choose
B．chosen
C．choosing
D．to choose
