在随机区组设计中，对于每种实验处理而言，它在不同的区组中重复的次数()

A、相等B、不等C、依据区组容量而定D、依据区组的质量而定

医疗保险

Wise buying is a (1)way in which you can make your money go further. The way you go about buying an article or a service can actually (2) your money or can increase the cost. Take the(3)example of a hairdryer. If you are buying a hairdryer, you (4 )think that you are making the best buy if you choose one which you like the look of, and it is the cheapest in (5) . But when you get it home, you may find that it takes twice as long as (6) model to dry your hair and the cost of the (7) plus the extra cost of your time could well (8) your hairdryer the most expensive one of all. So what principles should you adopt when you go out (9) ? If you keep your home, your car or any valuable possession in tiptop condition, you’ll be saving money in the (10)term. Before you buy a new appliance, (11) to someone who owns one. If you can, use it or (12)_ it to check whether it suits your particular purpose or not. According to a recent survey, almost half the things we buy in supermarkets are not what we really wanted before we (13) the supermarket. (14) this by compiling a detailed shopping list and sticking to it. Before you buy an expensive item, or a service, do check the price and what is (15) offer. If possible, choose from three items or three estimates.

1.A. positive B. negative C. real D. confident

2. A. put B. save C. deduce D. buy

3. A. simple B. just C. one D. simplified

4. A. should B. can C. have to D. may

5. A. value B. appearance C. price D. quality

6. A. a more expensive B. the cheapest C. most expensive D. a cheaper

7. A. performance B. electricity C. trouble D. function

8. A. make B. do C. charge D. enable

9. A. owning B. possessing C. dreaming D. shopping

10. A. short B. long C. near D. close

11. A. bargain B. discuss C. talk D. say

12. A. buy B. keep C. lend D. borrow

13. A. entered B. left C. got D. arrived

14. A. Object to B. Combat C. Fight D. Opposing

15. A. as B. by C. in D. on