半夏中的辛辣刺激性物质为
A．甾醇类成分
B．原儿茶醛
C．胆碱
D．天门冬氨酸
E．左旋盐酸麻黄碱
参考答案：B
—Would you like ______ beside the window, Simon?
—Yes, ______. [ ]
A. to sit; I'd love to
B. to sit; I'd like
C. sit; I'd love to
D. sit; I'd like
何谓战机的均衡性？
