离心泵轴功率与叶轮直径（）成正比。A.一次方 B.二次方 C.三次方 D.四次

对南北朝石窟艺术的表述，最能体现当时社会发展特点的是 

①继承了秦汉以来的艺术传统　②体现了田园诗意境　

③吸收了外来佛教艺术的优点 ④兼容道教艺术

A．①②　　

B．③④　　

C．②④

D．①③

阅读理解。

    Never go into a supermarket hungry! This is a good piece of advice. If you go shopping for food before

lunchtime, you'll probably buy more than you plan to. Unfortunately, however, just this advice isn't enough

for consumers these days. Modern shoppers need an education in how and how not to but things at the

store. First, you check the weekly newspaper ads. Find out the items that are on sale and decide if you really

need these things. In other words, don't but anything just because it's cheaper than usual! "New and

Improved!" or "All Natural" on the front of a package influence you. Instead, read the list of ingredients

(成分) on the back. Third, compare prices: that is, you should examine the prices of both different brands

and different sizes of the same brand.

    Another suggestion for customers is to buy ordinary items instead of famous brands. Ordinary items in

supermarkets come in plain packages. These products are cheaper because producers don't spend much

money on packing or advertising. The quality, however, is usually as good as the quality of well-known

name brands. In the same way, in buying clothes, you often find high quality and low pices in brands that

are not famous. Shopping on discount clothing stores can help you save a lot of money. Although these

stores aren't very attractive, and they usually do not have individual dressing rooms, not only are the prices

low, but you can often find the same famous brands that you find in high-priced department stores. 

    Wise consumers read magazine ads and watch TV commercials, but they do this with one advantage:

knowledge of the psychology behind the ads. In other words, well-informed consumers watch for information

and heck for misinformation. They ask themselves questions: Is the advertiser hiding something in small print

at the bottom of the page? Is there any real information in the commercial, or is the advertiser simply showing

an attractive image? With the answers to these questions, consumers can make a wise choice.

1. Before you decide to buy things you should ____. [ ]

A. make sure whether they are on sale

B. consider if you really need them

C. examine the prices of different brands

D. read the words on the front of the package

2. The writer suggests consumers buy ordinary products because ____. [ ]

A. they come in plain package

B. they are advertised on newspapers

C. they are both good and cheaper

D. the quality is better than that of famous ones

3. The main idea of the last paragraph is that ____.[ ]

A. ads and commercials sometimes tell lies

B. advertisements sometime hide some information

C. good consumers never read ads and commercials

D. we should make good use of ads and commercials

一个扇形的圆心角为60°，半径为10cm，求这个扇形的面积和周长。（π取3.14，结果保留两位小数）

元认知策略主要包括计划策略、监控策略和_________策略。

护理人员招聘考核的方式有（）。

A.护理知识考核

B.护理相关技能考核

C.面试

D.真实工作考核

E.试用