大豆种子的营养物质主要贮藏于〔〕
A．子叶
B．胚乳
C．胚轴
D．胚芽
答案：A
—What time would it be ______ for me to come round?
— Any time will do as long as you are free
A．convenient
B．fair
C．easy
D．comfortable
含有两个羧基的氨基酸是
A．赖氨酸B．酪氨酸C．苏氨酸D．谷氨酸E．丝氨酸
