下列物质中，作为生命活动的体现者、遗传信息的携带者、膜结构基本支架的依次是

已知集合$M=\left\{x|\left|x-7\right|<9\right\}$，$N=\left\{x|y=\sqrt{9-x^2}\right\}$，且$M,N$都是全集$U$的子集，则右图中阴影部分表示的集合是        （   ） 

如图，在绝缘水平面上相距为l的AB两点处分别固定着两个等量正电荷，a、b是AB连线上两点，，O为AB连线中点. 一质量为m带正电q质点以初动能E₀，从a出发沿直线向b点运动，第一次滑到O点时动能2E₀为，到b点的动能恰好为0，重力加速度为g，则（     ）

阅读理解
    Different weather makes people feel different．It influences health，intelligence and feelings．
    In August，it is very hot and wet in the south the US．People there have heart trouble and other kinds of health problems during this month．In the Northeast and the Middle West，it is very hot in the summer and very cold in the winter．People in these states have more heart trouble after the weather changes in February or March．
    The weather can also influence intelligence ． For example，in a 1983report by scientists，IQ(智商)of a group of students was very high when a very strong wind came, but after the strong wind,
    Their IQ was 10% lower than before. The wind can help people have higher intelligence. However,very hot weather can make it lower. Students in many schools of the US often get worse in exams(考试)in the hot months of the year(July and August).
    Weather also has a strong influence on people's feelings．Winter may be a bad time for thin people．They usually feel cold during these months．They might feel unhappy during cold weather．But fat people may have a hard time in hot summer．At about 18℃people become stronger．Low air pressure may make people forgetful．People leave more bags on buses and in shops on low-pressure days．
    Are you feeling sad，tired，forgetful，or unhappy today？It may be the weather's problem．

下列有关孟德尔遗传规律的说法，正确的是（    ）