A:汽车碰撞试验
B:二氧化碳制法
C:手表防水性试验
D:材料硬度测试
徐中约《中国近代史》记载:“孙中山看到,尽管西方列强拥有繁荣、独立与民主,但他们也为工业化的问题所困扰。为预防资本主义的罪恶,孙主张节制资本,以防止财富集中于少数人手中。另外,鉴于中国人口的增长超过土地面积的增加而带来持久的土地问题,孙提倡平均地权,从而实现远古时代‘耕者有其田’的乌托邦梦想。”材料表明
① 可能跟物体浸入液体的深度有关;
② 可能跟物体的重力有关;
③ 可能跟物体的体积有关;
④ 可能跟物体浸入液体的体积有关;
⑤ 可能跟液体的密度有关。
为了验证上述猜想,李明做了如图所示的实验:他在弹簧测力计下端挂一个铁块,依次把它缓缓地浸入水中不同位置,在这一实验中:
Tomorrow we will go to Hainan. It's warm there. We will have a special Chinese New Year's Day. Now let's get ready! We need three tickets from Shijiazhuang to Hainan. We don't need winter clothes. I want a beautiful dress. My parents take some T-shirts and shorts. We need to take milk, cakes and fruit. We need three hats. The sun is very hot there. We don't want to turn black. That's all done.
① ② ③ ④
⑤ ⑥ ⑦ ⑧
⑨ ⑩ ⑪ ⑫
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