题目内容

下列氨基酸中转化生成儿茶酚胺的是

A. 天冬氨酸
B. 色氨酸
C. 酪氨酸
D. 脯氨酸
E. 蛋氨酸

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A. 色氨酸羧化酶
B. 酪氨酸酶
C. 苯丙氨酸羟化酶
D. 色氨酸羟化酶
E. 赖氨酸羟化酶

A)A receptionist.
B)A secretary.
C)A nurse.
D)A traveller.

A)She doesn't like the shoes.
B)She is just looking around.
C)She doesn't like the service.
D)She can't decide which pair to choose.