为惰性电极．下列叙述正确的是（   ）

读澳大利亚气候分布图和澳大利亚农牧业分布图，回答下列问题．

“卡尔多•希克斯改进”是经济学家提出的一个描述收入分配和资源配置状态的经济模型，旨在确立一项衡量经济政策和行为成功与否的标准。其特点是，在一种变革中，获益者得到的利益足以弥补利益受损失者的损失。他要求一项经济政策能够从长远提高全社会的效率。下列事项中，符合“卡多尔•希克斯改进”的是（    ）

①国家扩大营改增范围，财政收入有所减少，但部分企业经济效益因此提高

②市政府向社会购买养老服务，政府收入减少，但社会公益事业得到更好发展

③国家完善初次分配中个人所得税税制，中低收入者收入增加，但高收入者缴税增多

④某地提高最低工资标准，企业近期利润可减少，但劳动者收入可能提高

大豆的白花和紫花为一对相对性状。下列四组杂交实验中，能判定性状显隐性关系的是（ ）。
① 紫花×紫花→紫花  ② 紫花×紫花→301紫花＋110白花
③ 紫花×白花→紫花  ④ 紫花×白花→98紫花＋107白花

阅读短文，然后从方框中选出可以填入文中空白处的单词

teacher   but    old    learn    with    boring     basketball    history    musician

Mr. and Mrs. Cooper are Americans. But now they are in Beijing ____ their kids. This is their first time to China.     

Mr. Cooper is a  ____. He sings very well. Mrs. Cooper is a ____. Her daughter studies at her school. Mrs. Cooper likes Beijing Opera very much. She thinks she can learn about Chinese ____ and culture. So she often goes to see Beijing opera. ____ her daughter doesn’t think so. She likes comedy , and her favorite movie is Mr. Bean. Mr. Cooper doesn’t like movies. He thinks they are____. He likes sports. His favorite sport is ____ . He likes Yao Ming very much. 

The Coopers want to go to Pingyao, Shanxi. It is an ____ and nice place. They want to take photos there. They can also____to speak Chinese. They can have a good time in China.