往复流
参考答案：
在近岸、河口区及狭长海峡地区，水流在平面上表现为沿某一轴线方向的往复运动。
. -I hear Huang Gang made an English speech at the graduation ceremony yesterday.
-______ , and ______.
A．So he did, so did I
B．So did he, so I did
C．So he was, so was I
D．So was he, so I was
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