____不会引起产物氨基酸序列的改变。
A．移码突变
B．同义突变
C．错义突变
D．无义突变
参考答案：B
将生咖啡豆浸入溶剂提取了咖啡碱的咖啡
Your letter will get attention! They know you're expecting the answer.[ ]
A. careful
B. common
C. instant
D. general
