通过召开国际会议来协调国际争端和冲突成为现代国际关系的一大亮点，但由于很多会议经常被帝国主义操纵往往带有大国强权政治的色彩。下列能够体现出这一点的会议有

①1919年巴黎和会    ②1922年华盛顿会议    ③1943年德黑兰会议    ④1945年雅尔塔会议

动物具有“学习能力”这有利于（    ）

1941年12月7日是一个遗臭万年的日子──美利坚合众国遭到了日本帝国主义海军部队突然和蓄谋的进攻……合众国当时同该国处于和平状态，而且，根据日本的请求，当时仍同该国政府和该国天皇进行着对话……我要求国会宣布：自1941年12月7日──星期日日本进行无缘无故和卑鄙怯懦的进攻时起，合众国和日本国进入战争状态。”

──美国总统富兰克林·罗斯福的演讲

（1）“美利坚合众国遭到了日本帝国主义海军部队突然和蓄谋的进攻”指的是什么历史事件？

（2）“合众国当时同该国处于和平状态”反映美国在“遭到突然和蓄谋的进攻”之前奉行的是什么政策？

（3）“美利坚合众国遭到了日本帝国主义海军部队突然和蓄谋的进攻”，这次进攻的直接影响是什么？​

现代社会倡导文明出行，过人行横道时行人应遵守交通信号灯指示。小天发现人行横道的红、绿灯是独立工作的，他设计了下列几种电路图，其中合理的是（    ）

信息归纳：阅读下文，根据所提供的信息, 完成下列表格。
    I am Jay from Yangjiang Sunshine Middle School. Recently, we carried out a survey on whom we prefer to share worries with. We got different answers.
    According to the survey, about 71% of the students would like to share their worries with their classmates and friends. It is mainly because they believe that if people are at the same age, they are easy to communicate and understand each other better.
    About 22% of the students said they would like to share worries with their teachers and parents. They think adults are rich in experience, and that they can solve their problems easily. The rest(其余的) prefer to keep worries to themselves. As for them, it's a struggle to get along well with others, some of them said they didn't want to trust anyone.
    In my opinion, I will share worries with my best friends because they're always kind and understanding. However, if I meet with some serious problems, I'll be likely to ask my parents and teachers for help, who, I believe, have more experience to give me valuable advice.

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