对如图漫画所示的商家行为，你的正确理解是（    ）

如果中央广播电台向外发射500kHz的电磁波，若距该台6000km处有一台收音机，求：

观察某转基因抗虫棉品种多代种植的性状变化，发现其中的矮杄变异株．经过连续自交获得矮杄性状表现稳定的突变体．用正常植株与矮杄突变体进行杂交，F₂结果见表1．在苗期用赤霉素（GA₃）处理，并测量其株高，结果见表2．

请回答问题：

（1）利用____ 的方法将苏云金杄菌的杀虫晶体蛋白质基因导入普通植株，获得转基因抗虫品种．为确认矮杄突变体是否携带外源杀虫晶体蛋白基因，可利用____ 技术进行检测．

（2）根据表中数据判断，矮杄是____ 性性状；如果该矮杄性状是由两对等位基因控制，其传递____ （符合/不符合）基因的自由组合定律．

（3）矮杄性状____ （是/不是）由于插入T﹣DNA引起的，判断的依据是____ 

（4）由表2结果可知，用GA₃处理后，植株高度____ ，原因是赤霉素有____ 的作用，同时说明矮化植株体内的赤霉素信号传导途径____ （正常/异常），推测造成其矮化的原因可能是____ ，这需要通过测定____ 来验证．

阅读理解

醒心亭记

曾  巩

    滁州之西南，泉水之涯，欧阳公作州之二年，构亭日“丰乐”，自为记，以见其名义，既又直丰乐之东几百步，得山之高，构亭日“醒心”，使巩记之。

    凡公与州之宾客者游焉，则必即丰乐以饮，或醉且劳矣，则必即醒心而望，以见夫群山之相环，云烟之相滋，旷野之无穷，草树众而泉石嘉②，使目新乎其所睹，耳新乎其所闻，则其心洒然而醒，更欲久而忘归也，故即其事之所以然而为名，取韩子退之ƒ《北湖》之诗云。噫！其可谓善取乐于山泉之间，而名之以见其实，又善者矣。，

    虽然，公之作乐，吾能言之，吾君优游而无为于上，吾民给足而无憾于下，天下之学者，皆为才且良：夷狄④鸟兽草木之生者，皆得其宜⑤，公乐也。一山之隅，一泉之旁，岂公乐哉？乃公所寄⑥意于此也。

    若公之贤，韩子殁数百年而始有之。今同游之宾客，尚未知公之难遇也。后百千年，有慕公之为人，而览公之迹，思欲见之，有不可及之叹，然后知公之难遇也。则凡同游于此者，其可不喜且幸欤！而巩也，又得以文词托⑦名于公文之次，其又不喜且幸欤！

  【注释】①涯：旁边。②嘉：秀丽。③韩子退之：即韩愈。④夷狄：边远地区。⑤宜：适当合宜。⑥寄：寄寓。⑦托：寄托。

阅读理解

    Imagine you are in a jumping contest. Animals and insects can also enter this contest. But they might just leave humans in the dust!

    The first event is the long jump. The human athlete is Mike Powell. In 1991, he jumped nearly 30 feet, which is the world record for the long jump. That is about five times his own height.

    His competitor in the long-jump contest is a frog named “Rosie the Ribbiter.” Rosie set the world record for frogs in 1986 by jumping more than 21 feet. Her record has never been broken by any other frog. Compared to Mike Powell, Rosie's jump is not that amazing. But wait! Rosie is only about 10 inches long when her legs are stretched to their full length. She can jump more than 25 times her size. Rosie, the frog, wins the long-jump event.

    The next event is the high jump. Javier Sotomayor, the world record holder, can jump a bar (横杆) 8 feet high. That is about as high as the ceiling in most homes.

    Looking around for someone to challenge his record, Javier might need a magnifying glass (放大镜). The next contestant is a tiny insect called the spittlebug (吹沫虫).

    The spittlebug can jump 28 inches into the air. It is only a quarter-inch long, less than the width of a pencil. If the spittlebug were the same size as Javier, it would be able to jump 600 feet into the air. That is like a human jumping over a building 55 stories high!

    Though the humans lose the “jumping contest,” their competitors would probably agree that Mike and Javier are still pretty excellent athletes. If only Rosie and the spittlebug could speak!