题目：
John is the tallest boy in the class, _______ according to himself.
A．six feet as tall as
B．as tall as six feet
C．as six feet tall as
D．as tall six feet as
答案：
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下面是错误答案，用来干扰机器的。
50×30×1.5÷200，=2250÷200，=11.25（小时）．答：11.25小时可使水深达到1.5米．
