肥胖是一种由多因素引起的慢性代谢性疾病。( )

（5分）下图中，A～E示意人体的不同结构层次，请据图分析回答下列问题。

（1）整个人体都是由A细胞发育而成的，A细胞通过____________    形成B，在此过程

中，___________复制后形成形态、数量完全相同的两等份，分别进入两个新细胞。

（2）B通过__________形成C，在此过程中，细胞的形态、结构和功能产生了差异。C中具有收缩和舒张功能的是____________。

（3）在上图的结构层次当中，人体具有而植物没有的是          。(填字母)

阅读下面短文，请根据短文后的要求进行答题。（请注意问题后的字数要求）

[1]Keeping a busy social life among lots of friends may keep people slimmer than spending hours on a treadmill, according to scientists. They say that socializing and meeting with friends helps boost levels of ‘brown fat’ in the boby which burns calories to generate heat.

[2]Living in a stimulating, social environment was found to reduce abdominal fat in mice by half over four weeks, even if they ate more. US researchers say that social stimulation can       

by converting white fat into brown, White stores calories and makes us fatter, while brown burns energy to generate heat .Converting white fat into brown is difficult, as we all know, normally requiring long term exposure to cold conditions or activating part of the body’s nervous system

[3]However, scientists from Ohio State University now think that having a busy social life is an even more effective way of changing white fat into brown, The team came up with their theory by studying the effects of various living environments on mice. Those who lived alongside a greater number of mice and had more space and toys to stimulate them lost far more weight over the course of the study than their ‘couch potato’ ones.

[4]Study author Dr. Mattew During, whose team’s findings appear in journal Cell Metabolism said: I’m still amazed at the degree of fat loss that occurs. Explaining how new technology had threatened face-to-face socializing, he added: ‘It’s not just a sedentary lifestyle and high calorie foods, but an increasing lack of social engagement.’

[5]Co-author Dr. Lei Cao said: ‘Loneliness is a profound factor for cancer and death; it’s on par with cigarette smoking. Social engagement is very important’.

小题1:What’s the main idea of this passage? (no more than 10 words)

小题2:Fill in the blank in Paragraph 2 with proper words. (no more than 5 words)

小题3:What’s the purpose of the study of mice? (no more than 20 words)

小题4:How does socializing help make people slim? (no more than 15 words)

小题5:Translate the underlined sentence into Chinese.

脑外伤中，临床主要表现为意识障碍、出现局灶性症状及体征的是（）

A.脑震荡

B.脑挫裂伤

C.颅内血肿

D.脑干损伤

E.弥漫性轴索损伤

当旅游团领队与旅游者之间发生纠纷时，中方导游人员一般应当(　　)。

A．偏向旅游者一方

B．偏向领队一方

C．保持中立

D．不介入

采用真空提气去法除二氧化碳时，应先降低污水的PH值至（）

A.4～5

B.3～6

C.8～9

D.4～7