有一面积为150cm²的金属环，电阻为0.1Ω，在环中100cm²的同心圆面上存在如图（b）所示的变化的磁场，在0.1s到0.2s的时间内环中的感应电动势为____ V，感应电流为____ A，流过的电荷量为____ C．

依法治国是我们党领导人民治理国家的基本方略。 依法治国的前提是（    ）

把下列带序号的句子依次填入文中横线处，使上下文语意连贯。（只填序号）

出上于河南新郑的莲鹤方壶是东周时期青铜礼器的代表器物。____；____；____；____。____。其造型宏伟气派，装饰典雅华关，堪称“国之重宝”。

①壶底还铸有两只卷尾兽，支撑全器的重量

②壶颈两侧有附壁回首的龙形怪兽双耳

③腹部的四角各攀附一条立体飞龙

④方壶通体满饰龙、凤花纹，凝重而不失华丽

⑤壶冠呈双层盛开的莲瓣形，中间平盖上立有一只展翅欲飞的仙鹤。

用试电笔来辨别家庭电路中的火线与零线，在如图所示的情况中，使用方法正确的是____ 。（选填“甲”或“乙”）

    There is a new park near my house. My family often go to the park on the weekend. There aren't any tall buildings in the park. There is a big lake in the park. But we can't swim in the lake. There are many flowers and trees near the lake. There is a small hill behind the lake. Beside the lake, there is a small shop (商店). The park is beautiful. I like it very much.