读《青年在选择职业时的考虑》，说说“妄自菲薄是一条毒蛇，它永远啮噬着我们的心灵，吮吸着其中滋润生命的血液，注入厌世和绝望的毒液”这句话的含意。

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Please ____ the tree. Can you ____ any apples on it?

A．look; see

B．look at; see

C．see; look

D．see; look at