配研法

某公司有关A材料的相关资料如下：

（1）A材料年需用量3600件，每日送货量为40件，每日耗用量为10件，单价20元。一次订货成本30元，单位储存变动成本为2元。求经济订货量（不足一件的按1件计算）和在此批量下的相关总成本。

（2）假定A材料单位缺货成本为5元，每日耗用量、订货批数及全年需要量同上，交货时间的天数及其概率分布如下：

求企业最合理的保险储备量。

剪刀步态可见于（）

A.震颤麻痹

B.脑性瘫痪

C.脊髓痨

D.动脉硬化

E.截瘫

Mr. Harris used to work in Dover, but then he changed his work, and he and his wife moved to another town. They did not have many friends there, but they soon met a lot of interesting people, and after a few weeks, they often went to dinner or to parties at other people's houses.

Then Mrs. Harris said to her husband, "We've been to a lot of other people's houses, and now we must invite them to our house, mustn't we?"

"Yes, certainly," answered her husband, "A big party will be the easiest thing, won't it? Then we can start to invite people to dinner in small numbers next month."

So Mrs. Harris said, "Yes, I'll invite all our friends here to a big party on 5th December."

"How many will that be?" Mr. Harris asked. "Don't invite too many."

Mrs. Harris was beginning to write the invitations when her husband saw that she was writing, "Party: 6:30 to 8:30 p.m."

"That isn't very nice, is it?" he said. "You're telling our guests that they must go at 8:30." So Mrs. Harris just wrote "Party: 6:30 p.m."

A lot of guests came, and they all had a good time, so they did not go home at 8:30. In fact they were still there at mid-night when the door bell rang and a policeman arrived. He said, "You must stop making a noise, because someone has complained(抱怨)."

Mr. Harris said he did not want to quarrel with the policeman, so everyone went home. They were sorry to have to go.

When Mr. and Mrs. Harris were alone again, she said to him. "That was a surprise, wasn't it? Who complained about the noise?"

"I did," Mr. Harris answered in a tired voice.

小题1:Why did Mr. Harris and his wife move to another town?

A．Mr. Harris changed his work.

B．They wanted to make some new friends.

C．They wanted to meet a lot of interesting people.

D．They enjoyed going to parties and visiting other people's houses.小题2:What made Mr. and Mrs. Harris hold a party at their house?

A．It was easy to hold a big party at home.

B．They could ask people to dinner in small numbers.

C．They had gone to other people's parties many times.

D．They liked making friends with others.小题3:How long would Mrs. Harris like the party to last?

A．From the morning till night.

B．About two hours.

C．About fourteen hours.

D．Till midnight小题4:When did the party end that evening?

A．At about 8:30.

B．About twelve o'clock..　　

C．When the policeman talked with Mr. Harris on the phone.

D．When someone telephoned the police station.小题5:Why did Mr. Harris telephoned the policeman about the noise?

A．Because someone rang his door bell many times at mid-night.

B．He did not want his friends to stay late that night.

C．His friends had a good time that night and also feel tired.

D．Because he hated the noise.

（6分）右图是常见固体物质的溶解度曲线，根据图示回答：

（1）曲线上M点表示                     ，t₃℃时，A、B、C三种物质的溶解度由大到小的顺序为        。

（2）t₁℃时，将10g A物质放入100g水中，充分溶解后所得的溶液是           （填“饱和”或“不饱和”）溶液。欲使t₂℃时C物质的饱和溶液变为不饱和溶液，可采取的方法是

                （任填一种方法）。

（3）现有30℃的不饱和KNO₃溶液，与该溶液有关的量有：

①水的质量    ②溶液中KNO₃的质量    ③KNO₃的质量分数

④30℃时KNO₃的溶解度    ⑤溶液的质量

Ⅰ．在该不饱和溶液中加硝酸钾至饱和，不变的量有            (填序号，下同)。

Ⅱ．将该不饱和溶液恒温蒸发至饱和，不变的量有             。

GMAT考试形式和时间是什么？