变电站所用电负荷计算采用换算系数法时，下列哪项设备应不予计算？（） A.空调机、电热

　　某中学校刊的一个栏目选定了以下四篇文章，请你为该栏目拟一个恰当的话题。要求：参照下列任一题目的结构和内容进行概括，不超过15字。

　　①《诚信为你带来幸运》 ②《善良是你快乐的源头》

　　③《节俭使你安稳无忧》 ④《宽容让你成大器》

　___________________________________________________

如图所示．一根轻质弹簧上端固定，弹簧的下端位置为C点，在下端挂一个质量为m的物体，物体的大小可以忽略．静止时物体位于A点，将物体向下拉至B点后释放，关于物体的运动情况，下面说法正确的是（　　）

A．物体由B到A的运动过程中，物体的加速度一直在减小

B．物体由B到A的运动过程中，物体的速度一直在增大

C．物体由B到C的运动过程中，物体的加速度一直在增大

D．物体由B到C的运动过程中，物体的速度先增大后减小

阅读理解。

     Everyone who has eaten instant noodles (方便面) before knows how it looks like. It is very easy to cook

it instantly by putting the noodles into the boiling water and add in those MSG (味精) packets, together with

your other food like eggs or vegetables. However, have you ever wondered whether this is the correct way

of cooking it? When you first took out the noodles from the packaging, you will notice that the noodles are

joined together nicely as a piece. In order to make the noodles joined together nicely side by side it needs some

form of wax coating (石蜡涂层) in order to show an attractive instant noodles in front of us. Many people

who enjoy eating instant noodles frequently do not really think too much of it as it seems very normal to

everyone to have it nicely shown in front of us. However, researches have shown that the wax coating on

the noodles is quite harmful to our body and we should not eat it too frequently. It is advisable to have a break

of 2-3 days before we start to eat another packet of instant noodles as our body need about 3 days to clear that

layer of wax coating away from our body system. Do you know the danger of having too much wax coating

stored in our stomach? It will lead to CANCER if it is stored in our body system for a long period of time.

     There are 2 key points to take note while preparing instant noodles:　

     1) Wash the instant noodles with warm water first, stir it and pour away the water containing the wax

coating.

      2) Repeat Step 1 and try to stir the noodles again to wash away the wax coating on the noodles before

cooking it in a new pot of water. Hope this article will let more people have self-awareness of the hidden

danger of instant noodles and thus eat safely and stay healthy.　

1. The purpose of the writer is to tell us ______.

A. how the instant noodles are made

B. how to cook instant noodles

C. something about the layer of wax coating on the noodles

D. how to eat instant noodles safely and healthily

2. It is true according to the passage that ______.

A. the instant noodles are joined together in a mess as a piece.

B. it is common to see the noodles nicely joined together.

C. you can eat instant noodles as often as you like.

D. too much wax coating does no harm to our health.

3. Many people don't care about too much of the wax coating on the instant noodles because _____.

A. they enjoy the taste of the wax coating

B. they take the wax coating for granted

C. they don't know the hidden danger at all

D. their body clear it faster than other people

4. The function of the wax coating in the instant noodles is to ______.

A. make the noodles more delicious and tasty

B. make it easier to cook for the consumers

C. make the instant noodles healthier and more attractive to the consumers

D. make the noodles joined in a piece and avoid them sticking (粘) together

对正态分布曲线的描述有误的是（）

A.正态分布曲线以均数为中心

B.正态分布曲线上下完全对称

C.正态分布曲线是左右完全对称的钟形曲线

D.正态分布曲线由两个参数固定

E.正态分布曲线在横轴均数上方所在处曲线为最高点

公元2世纪到公元16世纪被称为（）.