粮情检查中的“三温”是指：气温、仓温、粮温。

单项选择题是数学试题的重要组成部分，当你遇到不懂做的情况时，如果你随便选一个答案（假设每个题目有4个备选答案），那么你答对的可能性为（    ）．

经济社会长期生产能力得以提高的基本途径和手段是（）。

A.投资

B.消费

C.进出口

D.政府支出

柠檬酸三丁酯（TBC）是绿色环保的增塑剂，应用极其广泛，它的结构式如左下图，

试回答：

（1）TBC的分子式为________________，在研究TBC的结构时要用到一种谱图（如下），用于推测______________等信息，它是______________ 图（填序号）；

A．核磁共振氢谱

B．红外光谱

C．质谱

（2）1-丁醇在一定条件下可生成丁醛，反应类型为____________________，化学方程式为__________________， TBC在该条件下_______（填“能”或“不能”）生成含醛基的化合物；

（3）柠檬酸与甲醇反应生成柠檬酸三甲酯的化学方程式______________________________ ；

（4）TBC与足量NaOH溶液反应的化学方程式：_____________________________。

阅读理解。

     You have heard of Webster Toys. Webster's have made good, safe, interesting toys for more than a

hundred years. Now we sell them, and children play with them, in countries from New Zealand to Norway,

and from Japan to Brazil. We're looking for someone to sell our toys in the Far East. He (or She) will be

between the age of thirty and forty. He (or She) will already have some years of selling in world market

behind him (or her). He (or She) will speak good English, and at least one other language of the Far East. 

     The person we are looking for will live in Singapore, and work in our office there, but he (or She) will

trayel for up to six months in any one year. He (or She) will know the Far East quite well already. He (or

She) will understand money, and make more than ever before, for himself (or herself), and for Webster

Toys.

     Webster's want someone who can stand on his or her own feet. If you think you're the person we're

looking for, write to Mr. J. Sloman at our Head Office.

     Webster Toys Ltd.

     Church Mill, Watford.

     Herts, WD36HF.

1. Children play with Webster toys ____. [ ]

A. only in countries a long way from each other

B. in only four countries of the world

C. only in New Zealand, Norway, Japan and Brazil

D. all over the world

2. "He (or She) will already have 'some years' of selling in world market behind him (or she)" means ____. [ ]

A. he (or she) has already sold things in different parts of the world

B. he (or she) has sold toys for some years

C. he (or she) has some experience of selling in the world market for some years.

D. he (or she) has sold toys all over the world

3. The person will speak ____. [ ]

A. English and only one other language

B. English and a Far Eastern language

C. English or any other language

D. English or any other Far Eastern language

4. He (or She) will live in Singapore ____. [ ]

A. for at least 6 months in any one year

B. all through the year

C. for less than six months a year

D. for up to 6 months

5. "someone who can stand on his (or her) own feet" means some-one who ____. [ ]

A. doesn't stand on other people's feet

B. can understand money

C. understand many languages

D. can work by himself or herself

回转窑主要工艺操作是控制好（）、煅烧带的（）、（）和窑内（）四方面。