[简答题]小张去年只有17岁，在本镇的啤酒厂做临时工，每月有600元的收入。为了上班方便，小张在镇里租了一间房。7月份，小张未经其父母同意，欲花500元钱从赵某处买一台旧电脑，此事遭到了其父母的强烈反对，但小张还是买了下来。同年10月，小张因患精神分裂症丧失了民事行为能力。随后，其父找到赵某，认为他们之间的买卖无效，要求赵某返还钱款，拿走电脑。问： (1)此买卖是否有效？ (2)分析本案中买卖法律关系的构成要素。

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[单选题]下列有关急性中毒现场急救.去污染采取的措施正确的是( )。
A.眼受毒物刺激时,应用大量肥皂水冲洗
B.用大量肥皂水清洗污染的皮肤
C.为保持中毒者体温,严禁脱去有毒物污染的衣服
D.用大量清水或稀释盐酸清洗污染的皮肤

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[单项选择]栏杆柱的固定及其与横杆的连接，其整体构造应使防护栏杆在上杆任何处，能经受任何方向的（）的外力。
A. 800N
B. 900N
C. 1000N
D. 1100N

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[单选题]造成中断繁忙干线铁路行车( )以上的,为较大事故。
A. 3h
B.5h
C. 6h
D.8h

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[单选题]出血型胰腺炎与水肿型胰腺炎鉴别有意义的是
A. 血清淀粉酶升高程度
B. 血清脂肪酶升高
C. 血白细胞计数升高
D. 高铁血白蛋白阳性
E. 以上都不是

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[单选题]下列洒水喷头的说法中,关于易熔元件喷头的是( )。
A.具有释放机构的洒水喷头
B.无释放机构的洒水喷头
C.通过易熔元件受热熔化而开启的喷头
D.通过玻璃球内充装的液体受热膨胀使玻璃球爆破而开启的喷头

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[单项选择]

Sparks created in a lab give off X-rays, scientists announced Monday.
X-rays are a byproduct (副产物) of high-energy electron discharges in the Sun, in exploding stars, and even in lightning. Many scientists did not expect sparks alone to do the trick.
Researchers at Florida Institute of Technology brought their equipment, which had detected X-rays in lightning, into the lab. Half the team expected to see X-rays and the other half did not.
In sparks of 1.5 million to 2 million volts, the researchers indeed recorded X-rays that were remarkably similar to those produced by lightning.
"This amazed us, It opens the door to answering really big questions about lightning by generating it in the lab," said team member Hamid Rassoul. "It also tells us that we have a lot’ to learn about how even small sparks work."
X-rays are a form of electromagnetic radiation, on a spectrum (频谱) that runs from radio waves on the low
A. All the researchers doubt that X-rays can be produced by sparks at first.
B. X-rays produced in lab is just the same with those by lightning.
C. The result of the study is in expectation of every researcher.
D. The researchers detected X-rays in sparks of 1.5 million to 2 million volts.

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[单选题]检查整流元件,必须用万用表,绝不允许用兆欧计(摇表)或高于( )V 的电源来检测。
A.6
B.12
C.24
D.30

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[单项选择]With the development of the global economy, many companies engage in a worldwide manufacturing business and claim they are a multinational company.
Some economists (31) between the international firm and the multinational company in the following way. the "international firm" is a term that (32) enterprises with various degrees of world orientation in their business; (33) the "multinational company" is one type of international firm. The international firm engages in any activity or (34) of activities from exporting, importing and licensing to full scale manufacturing in a number of countries. The international (35) of such a company varies from the point at which overseas sales and profits take on importance and top management begins to (36) some attention to them to the stage (37) the company is globally oriented in its marketing, production, (38) , and other decisions and (39) alternative opportunities around the wo

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