属于碱性氨基酸的是()。
A.赖氨酸
B.丙氨酸
C.谷氨酸
D.亮氨酸
E.脯氨酸
参考答案:A
- What do you think of the manager of your company?
- Oh he is________ manager who is pleasant to work with. It's ________ pleasure to work with him.
A.the; the
B.a; a
C.a; the
D.the; /
精度要求高的齿轮传动机构,压装后应检查()和()。