配制氯化钠等渗溶液500ml(1%氯化钠溶液的冰点降低度为0.58℃),需用氯化钠为

题型:单项选择题

问题:

配制氯化钠等渗溶液500ml(1%氯化钠溶液的冰点降低度为0.58℃),需用氯化钠为

A.4.0g

B.4.5g

C.5.5g

D.6.0g

E.6.5g

考点:卫生资格考试(中初级)儿科基础知识儿科主治医师基础知识1
题型:单项选择题

阅读理解

     Ants have an amazing ability to communicate with each other and work together to accomplish(完成)

difficult tasks.Their specialized behavior due to chemical communication is so well developed, in fact, that

humans can learn a lot from them about how to work best in teams.

      British scientists at the University of Bristol are studying colonies(群体)of army ants to understand

how they organize themselves and share knowledge.These insects-which come in various sizes-are known for using their bodies as living plugs to cover holes on the uneven ground between their nest and their prey.When they meet a hole in their path, they can quickly determine which of them is the best fit.The

appropriate ant then lies across the gap, allowing the remainder of the group-as many as 200,000 other

ants-to step on its back.This important minority of ants makes the food collection of the entire colony in

the best possible way by "paving the way" for the others.

     The collective behavior that emerges from a group of social insects, such as ants, can be called

"swarm intelligence". Swarm intelligence consists of the selforganization of many individuals that work

collectively to find the best solution to a difficult problem.The concepts of swarm intelligence have been

used in a variety of human applications.It has been used as a method that improves the efficiency of

goods transfers on airplanes, and has even become a routing technique for moving data across

telecommunications networks more smoothly.You could say that our daily lives benefit from the tireless

work of ants.

1. What can we learn from ants according to the text?

A. How to help others to achieve great goals.

B. Good communication skills are important.

C. How to achieve the best result by working as a team.

D. The hardworking spirit in teamwork.

2. A study made by British scientists suggests that________.

A. ants are a group of clever insects

B. army ants' behavior is difficult to understand

C. ants enjoy using their bodies as living plugs

D. ants' collective behavior ensures their food supply

3. What can we learn about "swarm intelligence"?

A. It is a kind of collective behavior in social insects.

B. It refers to the selforganization of many insects.

C. The concepts of it will be used by many animals.

D. It is the best method of processing data.

4. The study of ants' behavior can be applied in ________.

A. road transportation and education

B. aerial transport and telecommunications

C. team organization and engineering

D. computer and information technology

题型:单项选择题

根据汉语意思完成下列各句

1、李老师,早晨好。

       __________ __________ Miss Li.

2、你好吗,玲玲?

      __________ __________ __________ , Linging?

3、你好,我是汤姆汉克斯。你叫什么名字?

      __________ , __________ Tom Hanks. __________ __________ __________ ?

4、—How are you?

     我很好,谢谢你。

     — __________ , __________ __________ .

5、再见,同学们。

     __________ ___________.

题型:单项选择题

如图甲所示,力传感器A与计算机相连接,可获得力随时间变化的规律。   将力传感器固定在光滑水平桌面上,测力端通过轻质细绳与一滑块相连,调节传感器高度使细绳水平,滑块放在较长的小车上,滑块的质量m=1.0kg,小车的质量为M=0.65kg。一根轻质细绳跨过光滑的定滑轮,其一端连接小车,另一端系一只空沙桶,调节滑轮可使桌面上部细绳水平,整个装置先处于静止状态。现打开传感器的同时缓慢向沙桶里倒入沙子,当小车刚好开始运动时,立即停止倒沙子。若力传感器采集的F-t图象如乙图所示,请结合该图象,求:(重力加速度g=10m/s2

(1)小车刚开始运动时沙桶及所装沙子的总质量m0和滑块与小车间的动摩擦因数μ;

(2)小车运动稳定后的加速度大小。

题型:单项选择题

加热器的凝结放热加热段是利用()。

A、疏水凝结放热加热给水;

B、降低加热蒸汽温度加热给水;

C、降低疏水温度加热给水;

D、加热蒸汽凝结放热加热给水。

题型:单项选择题

按《锅炉压力容器压力管道及特种设备安全监察行政处罚规定》要求,违反设备设计、制造、安装、使用、检验、修理、改造等有关法律法规规定,造成事故的,依据有关规定进行处理,构成犯罪的()。

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