人类首次证实地球是一个球体的事件是

“要加强对权力运行的制约和监督，把权力关进制度的笼子里。”下列国家中最早实现这一政治理想的是（　　）

下列各句中划线词语的使用，全都正确的一项是（    ）

①连续一个小时的体能训练后，篮球队员们累得如吴牛喘月，但为了能在高中篮球联赛上取得好成绩，大家都毫无怨言。

②苏轼是一代文豪，也是一代书法名家，他常常以诗赠人，其诗又借其书法得以传播，诗与书相辅而行，深受后世推崇。

③这只闯入村庄的大棕熊，把村民储存食品的柜子翻了个遍，大快朵颐，毫无顾忌，饱餐一顿后扬长而去，真令人哭笑不得。

④虽然社会各界对具备认知计算能力的人工智能的发展及其可能存在的威胁莫衷一是，但都认同2016年是“认知计算元年”这一说法。

⑤一些城市在明知自身不适合或者没有能力的情况下，却偏要投入大量的人力物力去建设地铁，最后得不偿失，这无异于火中取栗。

⑥为了使国学教育有实效，在浩如烟海的国学书籍中排沙简金，是我们必须做好的事情，教师和家长都应成为“把关者”。

如图示人体生长激素基因进行的某项生理活动，该基因中碱基T为m个，占全部碱基的比值为n．下列分析合理的是（    ）

(B)

Li Qiang and Li Gang are brothers. But their living habits (习惯) are different. Now let’s go to Li Qiang’s room. Li Qiang cleans his bedroom every day and puts his things away. Look! There is a computer on the desk. There are two balls under the bed. A guitar and a kite are on the wall. Some books are on the shelf. So he must be a careful (细心的) boy. Now let’s go to Li Gang’s room. The room is not clean. Can we see his clothes on the desk? Oh, yes. We can see a football and a knife on the desk, too. Li Gang never does any cleaning on weekends. So his room is in a mess.

What do you think of Li Qiang and Li Gang? Li Qiang is a good boy. Li Gang must learn from his brother.