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问题 选择题

下列各组中属于同系物的是（     ）                                     

A．葡萄糖和果糖

B．甲烷和乙烷

C．16O和18O

D．金刚石和石墨

答案

答案：B

同系物指结构相似、通式相同，组成上相差1个或者若干个CH2原子团，具有相同官能团的化合物。

葡萄糖与果糖，分子式相同，都为C6H12O6，葡萄糖是多羟基醛，果糖是多羟基酮，为官能团异构，故A错误；

甲烷和乙烷，组成通式相同，都属于烷烃，相差1个CH2原子团，为同系物，故B正确．

C．16O和18O 是同素异形体不是同系物；C错误

D．金刚石和石墨是同素异形体不是同系物。D错误。

选B

选择题

下列比例尺中，最大的是[ ]

A．1：2000000

B．1千万分之一

C．1：1000

D．1：200000
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阅读理解
Want to find a job? Now read the following advertisement.
FAIRMONT HOTEL
Five Waiters and Ten Waitresses
-Aged under 22
-At least high school graduate
-Good-looking; men at least 1.72 meters tall and women at least 1.65 meters
-Those knowing foreign languages favored
-Paid 1, 600-2,200 dollars per month
One Secretary
-Aged under 30
-Female favored
-Good at writing and skilled at computer
If interested, call 465-4768 or write to:
Mr. Jack Hundris
Room 0825, Fairmont Hotel
567 Wood Street, San Markers, 78003
Fax:6954828
WILSON BOOKSTORE
Accountant(会计)
-Aged between 25 and 40
-With an experience of at least two years
-With a degree and an accountant certificate(证书)
-Paid 3, 000-4,000 dollars monthly
-With a practical knowledge of computer
Salesclerk
-Basic education of 12 years or more
-Good at computer
-Paid 1, 800-2,2000 dollars monthly
Tel:447-4398
Fax:3485269
小题1:If you don’t know how to use a computer, you can just apply for the position as_____.
A．a secretaryB．a waiteror a waitressC．an accountantD．a salesclerk
小题2:If you want to get the position of accountant in Wilson Bookstore, you have to satisfy the following conditions EXCEPT_____.
A．being a woman
B．knowing well how to use a computer
C．having been an accountant
D．having an accountant certificate
小题3:If you want to try for a job in Fairmont Hotel, you_____.
A．have to be a woman and know foreign languages
B．should be a university graduate
C．have to be taller than 1.72 meters
D．should be younger than 22 years old
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