能生成儿茶酚胺类激素的是（）
A.组氨酸
B.α酮戊二酸
C.谷氨酸
D.天冬氨酸
E.酪氨酸
参考答案：E
—Your colleague is speaking English with fluency.
—It's no wonder．She ____ in the UK for a year as a visiting professor．
A．worked
B．has worked
C．had worked
D．has been working
呃逆，古代称为（）
A.噫
B.哕
C.噎
D.干呕
E.嗳气
