题目

The baby cried again. The young mother felt very        and her husband wore  ____ expression on his face,too. A.confused; confused B.confusing; confused C.confusing; confusing D.confused; confusing   答案:A第一空表示“感到困惑”,用confused作表语;第二空表示“感到困惑(所表现出)的表情”,用confused作定语。本题的难度在第二空上,和confused expression 类似的还有confused look,confused eye 等。  填写推理的理由: 已知,如图,∠1=∠2,CF⊥AB,DE⊥AB,说明:FG∥BC. 解:∵CF⊥AB,DE⊥AB, ∴∠BED=900,∠BFC=900. 理由是:                     . ∴∠BED=∠BFC. ∴ED∥FC. 理由是:                                . ∴∠1=∠BCF. 理由是:                             . 又∵∠1=∠2, ∴∠2=∠BCF. ∴FG∥BC. 理由是:                                      .
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