计算机病毒的结构包含四个模块，其中是否具有（）是计算机病毒区别于一般程度的本质特征。

How do you remember the way to your house? Where do dreams come from?

It is your brain (大脑) that does these things. A British scientist showed that sleep can improve one’s memory. It’s not a dream for students to study when they sleep. In fact, your brain is working day and night. If you learn words before bed, a certain part of your brain may help you to remember the words while you sleep. What’s more, another scientist in the USA found that there was a “talent button(按钮)” in the human brain. It might make a person more talented(有才能的).

There are more interesting things about the brain. Your brain uses less energy than a fridge light. Just two bananas can give the brain enough energy to work for a whole day. According to some scientists, yawning（打哈欠）keeps your brain “cool”, which makes us think quicker.

Here are some pieces of advice to keep a good brain:

● Eat healthy food.

● Get a lot of playtime or exercise.

● Don’t drink or smoke.

● Use your brain a lot.

小题1:A British scientist found out that               .

A．drinking could affect our memories.

B．dreams could affect our memories.

C．sleep could improve our memories.

D．bananas could improve our memories.小题2:According to the passage, if we want to have a good brain, we should  .

A．use our brains more

B．sleep fewer hours

C．work longer hours

D．remember fewer things小题3:Which of the following is TRUE according to the passage?

A．Our brains only work in the daytime.

B．Our brains need much energy every day.

C．Smoking can keep our brains healthy.

D．Getting exercise is good for our brains.

患者男性，50岁，农民。畏寒、发热、全身酸痛、腰痛3天。大便稀，5～6次/日，伴呕吐6次。查体：T39.8℃，P108次/分，R26次 /分，BP90/60mmHg，神志清楚，烦躁，急性重病容，眼结膜明显充血水肿，上腭、双腋下及胸背均可见小的出血点，颈软，双肺呼吸音清，脐周压痛，移动性浊音可疑。

入院第2天患者血压、体温恢复正常，但腹痛呕吐加剧，尿量300ml/24h，腹部压痛伴肌紧张，移动性浊音阳性。血常规：WBC54.1×10/L，Plt69×10/L。尿蛋白（+++）。应首先进行的检查包括（）

A.PT

B.腹部CT

C.腹水常规及生化检查

D.腹腔穿刺

E.肾功能

F.骨髓穿刺

G.血培养

H.AFP

I.肝功能

J.乙肝全项

62岁的李小风老人深感没有文化之苦，于9月1日重新回到课堂，成为学习尤为勤奋的“大学生”。这一事例告诉我们[     ]

①不接受教育就无法生活

②教育涉及千家万户，和广大人民的生活息息相关 

③接受良好的教育，已逐渐成为人们生存和发展的第一需要和终身受益的财富 

④教育的重要性已为越来越多的人们所认识 

A．①③④

B．②③④

C．①②③

D．①②④ 

境内企业收到为境外企业垫付的（），应申报在“服务－旅游－教育、培训收入”项下，国际收支交易编码为“202050”。

A、旅游

B、工资

C、会议培训费

生活饮用水卫生标准中一般化学指标有多少项？其中对水的pH值和总硬度有何要求？