抹灰施工对基体表面的灰尘、______等，应清除干净，并用清水冲洗。

“南北对话”中的“南”指的是[ ]

A、南半球的国家

B、发达国家

C、南美洲

D、发展中国家

可逆定温过程中，理想气体与外界交换的热量为（）。

A.A

B.B

C.C

D.D

第二节：完形填空(共20小题；每小题1分，满分20分)

阅读下面短文，掌握其大意，然后从21-40各题所给的四个选项(A、B、C和D)中，选出最佳选项，并在答题纸上将该选项标号涂黑。

Wise buying is a positive way in which you can make your money go further. The   21   you go about purchasing an article or a service can actually   22   you money or can add   23    the cost.

Take the   24   example of a hairdryer. If you are buying a hairdryer, you might   25   that you are making the   26  buy if you choose one   27  look you like and which is also the cheapest   28   price. But when you get it home you may find that it   29  twice as long as a more expensive   30   to dry your hair. The cost of the electricity plus the cost of your time could well   31  your hairdryer the most expensive one of all.

So what principles should you   32  when you go out shopping?

If you   33  your home, your car or any valuable   34  in excellent condition, you’ll be saving money in the long   35  .

Before you buy a new   36  , talk to someone who owns one. If you can, use it or borrow it to check it suits your particular   37  .

Before you buy an expensive   38  , or a service, do check the price and   39   is on offer. If possible, choose   40  three items or three estimates.

21.   A. form                     B. fashion                   C. way                    D. method

22.   A. save                      B. preserve                 C. raise                   D. obtain

23.   A. up                        B. to                          C. in                       D. on

24.   A. easy                      B. single                     C. simple                 D. similar

25.   A. convince               B. accept                    C. examine              D. think

26.   A. proper                  B. best                       C. reasonable           D. most

27.   A. its                        B. which                    C. whose                 D. what

28.   A. for                       B. with                       C. in                       D. on

29.   A. spends                  B. takes                      C. lasts                    D. consumes

30.   A. mode                    B. copy                      C. sample                D. model

31.   A. cause                    B. make                     C. leave                   D. prove

32.   A. adopt                    B. lay                         C. stick                   D. adapt

33.   A. reserve                  B. decorate                 C. store                   D. keep

34.   A. products                B. possession              C. material              D. ownership

35.   A. run                       B. interval                  C. period                 D. time

36.   A. appliance              B. equipment              C. utility                 D. facility

37.   A. function                B. purpose                  C. goal                    D. task

38.   A. component            B. element                  C. item                    D. particle

39.   A. what                     B. which                    C. that                     D. this

40.   A. of                         B. in                          C. by                      D. from

钙沉积于前弹性层( )

A．老年
B．角膜带状变性
C．格子状角膜营养不良
D．颗粒状角膜营养不良
E．Fuch角膜内皮营养不良

从所给的四个选项中，选择最合适的一个填入问号处，使之呈现一定的规律性。（）

A．

B．

C．

D．