某一药品说明书中标有：本药品每克含碘150mg、锌1.5mg、锰1mg，这里所标的成分是指 [ ]
A.分子
B.原子
C.元素
D.无法确定
答案：C
完成下列对话。
A: Is this your 1 ?
B: No, 2 3 . My watch is red. I think it's her 4 .
A: Li Juan, 5 6 your 7 ?
C: Yes, 8 9 . Thank you.
A: You are welcome.
1._____2._____3._____4._____5._____
6._____7._____8._____9._____
While Helen _________the piano, her mother came in. [ ]
A. was playing
B. is playing
C. played
D. plays
