从题中所给的A、B、C、D四个选项中选出与句中划线部分意义最接近的解释。
Jack called his mother at 7:30 yesterday, but she didn't pick up at that time.
A：answer
B：speak
C：talk
D：ring
将浸泡过的玉米种子纵切，在剖面上滴加碘液，看到的现象是（ ）
