以下对脱水的论述哪一项是错误的：（） A.等渗性脱水又称为混合性缺水 B.高渗性脱水

阅读理解。

     Try touring the Shanghai World Expo Site at night if you are tired of the endless queues, the blazing

sun and crowds of people during the daytime. Nitht -time tickets for the Shanghai World Expo are already available, and tourists can enjoy a completely different view when night falls.

     First, night -time tickets are much cheaper and tourists can avoid peak hours. A daytime ticket costs

160 yuan, while a night-time ticket only costs 90 yuan.

     Second , night-time tickets save tourists a significant amount of time spent in queues so they can visit

more pavilions. On the whole, although going at night allows only half the time during the day, tourists

spend less time in queues and can visit roughly as many pavilions as in the daytime.

     Third, the lights are all on at night, giving tourists a wonderful night view of bright lights that they cannot possibly see in the daytime. Dressed with all kinds of colored lights, the Expo Site looks brilliant and

charming at night.

      Fourth, the Expo is more pleasing and comfortable at night because pavilions provide more and better interactive activities at night. There are performances at the Expo Cultural Center every night, and concerts performed by world-famous singers on weekends.

      Fifth, services are still excellent at night. Tourists can glut themselves with delicacies at a food plaza (广场) which is ablaze with lights even past 10 p.m.. In addition, the plaza is much less crowded and busy at night than during day.

1. What's the disadvantage of touring the Shanghai World Expo Site at night? 

A. Protecting yourself from the blazing sun.

B. Avoiding crowds of people.

C. Avoiding peak hours.

D. Less visiting time.

2. A night-time ticket __________.

A. costs twice less than a daytime ticket.

B. allows the tourists half as much time as a daytime ticket.

C. allows the tourists to visit more pavilions.

D. offers the tourists a free dinner at a food plaza.

3. Which of the following is wrong according to the passage?

A. The tourists can have a wonderful night view of bright lights at the Expo Site.

B. The Expo Site looks brilliant and charming at night because of all kinds of colored lights.

C. Tourists can enjoy interactive activities at night.

D. There are performances and concerts performed by world-famous singers at the Expo Cultural Centre every night

4. The underlined word " glut" in the last paragraph means ________.

A. overfeed      

B. help    

C. enjoy    

D. make

设L为抛物线y=x2上从0（0，0）到P（1，1）的一段弧，则曲线积分的值是（）．

A.1

B.0

C.1/2

D.-1

上厕所属于（）

A.运动方面

B.自理方面

C.交流方面

D.家务劳动方面

E.以上均不是

我国对学生的义务做出明确具体规定的法律是（）。

A.《宪法》

B.《教育法》

C.《义务教育法》

D.《未成年人保护法》

下列各项，可导致新生儿黄疸的病因是（）

A.蛋白质代谢异常

B.胆红素代谢异常

C.脂肪代谢异常

D.糖代谢异常

E.水盐代谢异常