淀粉的消化产物是()
A、葡萄糖
B、蔗糖
C、果糖
D、半乳糖
参考答案：A
数据的基本单位是 【2】 。
As she was singing,she suddenly _____,which gave us a big surprise .
A．broke down
B．broke out
C．took down
D．got down
