在侵权行为发生以后，我们应勇敢的拿起____ ，维护自己的____ 。

海拔较高、中部平坦、边缘陡峻的是（　　）

蚯蚓可以式土壤疏松，增加土壤肥力，这说明了（    ）

如图，在△ABC中，点D是BC的中点，点E、F分别是线段AD及其延长线上，且DE=DF，给出下列条件：①BE⊥EC；②BF∥EC；③AB=AC，从中选择一个条件使四边形BECF是菱形，并给出证明，你选择的条件是___（只填写序号）．

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从右栏中找出与左栏句子相应的答语。

①Who did he go with?____      A. It was great.

②How was your weekend? ____  B. Sounds good.

③I went fishing last weekend. ____   C. Yes. There are some tomatoes.

④Are there any vegetables? ____  D. Yes, please.

⑤Would you like a large bowl? ____  E. He went with his friend.