题目内容：

The difference in thickness and weight from the earlier version makes the iPad 2 more comfortable t
to hold 这是11年高考题.怎么解释,为什么不用to be held 或hold

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某些“be+形容词+to do”结构中的不定式通常要用主动形式表示被动意义：The question is difficult to answer. 这问题很难回答.Your writing is impossible to read. 你的书写没法认.Do you think the water is safe...