先天性甲状腺功能降低症的患儿注意保暖护理的原因是()A．肠蠕动较强，导致腹泻 B．基

点A（-3，5）在第______象限，到y轴的距离为______．

Jack lay, quiet and unmoving, for thirty minutes while a stranger repeatedly stabbed(刺) him with sharp needles, causing blood to pour steadily out of his leg. Jack was getting a tattoo. His friend Tony had recently gotten a tattoo, and Jack was so impressed by it that he decided to get one too. Peer pressure, media influence, and personal expression are some of the common reasons for wearing tattoos today.

The desire to be accepted by one’s friends or peers can have a great influence on what a person does. Sometimes, wearing a tattoo can be a sign that you belong to a certain group. Gangs often use special clothes and tattoos to identify their particular group. Some of these groups wear only brand-name clothes. Others wear tattoos. When a person’s friends are all doing something, that person is more likely to do the same thing.

The media is another big influence behind the popularity of tattoos in North America. A wide variety of media images show tattoos—people appearing in commercials selling expensive cars, famous sports heroes with tattoos in magazines, fashion models wearing designer clothes that show their bodies tattooed with detailed and colorful patterns. These media images link tattoos to ideas of wealth, success, and status. As a result, many people decide to get a tattoo for its fashion and status value.

Many people decide to wear tattoos in order to express their artistic nature, their beliefs, or their feelings－in other words, to show their individuality(个性). A musician in a rock band may get a tattoo of a guitar on the arm. Some environmentalists may tattoo pictures of endangered animals on their shoulders. A tattoo can be a public sign to show what is important in a person’s life.

As you can see, there are many reasons why young North Americans get tattoos. A tattoo can be part of a group’s uniform, a sign of fashion, or an expression of individuality. The decision to get a tattoo is most often a result of the influence of friends or media or the desire to express oneself. For Jack, it was a mixture of all three.

小题1:Jack has got tattoos in order to ________.

A．show his great bravery

B．gain a special experience

C．make himself more healthy

D．be different from others小题2:According to the passage, media images are linked to ________.

A．traditional lifestyle

B．social position

C．cultural background

D．public interest小题3:We can infer from the passage that ________.

A．some people get tattoos out of pressure

B．tattoo is related to religious belief

C．getting tattoos costs a lot of money

D．most people with tattoos are artists

镁、铜等金属离子是人体内多种酶的辅因子。工业上从海水中提取镁时，先制备无水氯化镁，然后将其熔融电解，得到金属镁。

(1)以MgCl₂为原料用熔融盐电解法制备镁时，常加入NaCl、KCl或CaCl₂等金属氯化物，其主要作用除了降低熔点之外还有____________________。

(2)已知MgO的晶体结构属于NaCl型。某同学画出的MgO晶胞结构示意图如下图所示，请改正图中错误：_____________________。

(3)用镁粉、碱金属盐及碱土金属盐等可以做成焰火。燃放时，焰火发出五颜六色的光，请用原子结构的知识解释发光的原因：_____________________________。

(4) Mg是第三周期元素，该周期部分元素氟化物的熔点见下表。氟化物的熔点

解释表中氟化物熔点差异的原因：________________________。

(5)人工模拟酶是当前研究的热点。有研究表明，化合物X可用于研究模拟酶，当其结合或Cu(I) （I表示化合价为+1）时，分别形成a和b： 

①a中连接相邻含N杂环的碳碳键可以旋转，说明该碳碳键具有_________键的特性。

②粒子间作用力包括化学键和分子问作用力，比较a和b中粒子间作用力的差异______________。

Um接口中的第三层包含哪些管理功能（）

A.CM

B.MM

C.RR

D.数据链路管理

面瘫针刺按远道取穴常取（）

A.阳白

B.足三里

C.颊车、完骨

D.风池

E.合谷