钢材做成“V”形是因为材料的抗弯曲能力与其形状____关。

    I had worked that day, as a nurse. Now I faced the dirty supper dishes. I wanted to 1 why Jimmy hadn't phoned as usual to say "Good night" to Bob and Tom. "Maybe Daddy's  2 working on an accident," I said to Bob. "Go to 3 now. You'll see him in the morning." Soon there was a knock at the door. "There 4 be something wrong with your phone," my neighbor told me. "The City Police Station wants you to 5."

    I went into the living room and dialed. Then I 6  the words every police wife fears (害怕): "Your husband has been hurt." When I reached the hospital, my heart sank (下沉). The entrance was jammed with TV-news trucks. In the 7 I saw Jimmy's best friend, Smith. "Just tell me -is he alive?" I asked.

    Smith 8 and didn't answer. Then I found my younger sister, Mandy. "He's 9." she told me, and we began to cry together.

    Later, Smith told me 10 had happened.

    In the morning, when my little Bob asked, "Where's Daddy?" I 11 him into my arms and tried to explain. "A bad man 12 Daddy last night." I said. "Daddy can't come home any more. He's in heaven(天堂) now."

    My son looked at me, his blue eyes 13 the picture of trust(相信). "Do they have 14 in heaven?" he asked. "Can I call him?"

    "No, Bob, Daddy still loves you, but Daddy can't 15".

如图表示某一植物的一段枝条、枝芽、种子的结构示意图，据图分析回答：

古诗文名句填空。
①今夜偏知春气暖，            。
②且壮士不死即已，死即举大名耳，                 ！
③古代诗歌中，有一类诗句全部以名词组合而成，展现了情景交融的美妙境界，如温庭筠《商山早行》中的“          ，人迹板桥霜”；马致远《天净沙·秋思》中的“枯藤老树昏鸦，         。”
④在默写古诗词名句时，有时同学不能正确区别“雁”与“燕”而出现误写。其实，这两种形象在古诗词中表达的情感是不同的，“雁”一般与思乡有关，如         ，             。而“燕”一般则与报春有关，如               ，               。