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问题 选择题

下面是小明设计的“调查湛江市初中学生近视发病率”的几种实施方案，你认为最合理的方案是[ ]

A．选取湛江部分城市中学的学生作为样本进行调查分析

B．选取湛江部分农村中学的学生作为样本进行调查分析

C．成立一个调查小组，对湛江市所有的初中学生进行调查和统计

D．选取湛江部分农村和城市中学的学生作为样本进行调查和分析

答案

答案：D

单项选择题 A1/A2型题

预防创伤后发生气性坏疽最可靠的方法是（）。

A.彻底清创

B.及时给予气性坏疽抗毒血清

C.使用大量抗生素

D.输血和纠正水盐平衡

E.输血、输注白蛋白
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单项选择题


以下是一份单据的部分内容，请从各题给出的答案选项中选出可以填入空白处最合适的答案

China National Cereals,Oils & Foodstuffs Import and Export Corparation,Shenzhen Branch,hereinafter called the (81) ,agree to sell and China Native Products INC,Los Angels,California, (82) ,hereinafter called the Buyers,agree to buy the under-mentioned goods subject to the terms and conditions stipulated (83) :
1．Name of Commodity &Specifications:ZHONG HUA BRAND Salted Cucumber50 tins*200 grams
2．Quantity and Weight:100 Cartons/1000kg
3． (84) price:C & F C3% Los Angeles or San Francisco US$20.00 Per carton
4．Amount:US$2000.00
5．Time of Shipment:During Oct./Nov.,2009
6． (85) :In Cartons
7．Marks & No.:ZHONG HUA BRAND
Salted Cucumber
No.1-100
8．Loading (86) and Destination:From Shenzhen,China to Los Angeles Or San Francisco
9．Insurance:To be (87) by the Buyers
10．Terms of Payment:To be made against sight draft drawn under an irrevocable (88) ,for the total value of goods in US$2000.00, (89) 10% more or less both in amount and quantity at Sellers’ s option,established through a bank which is mutually agreed by the two sides.
11．Inspection:Certificate of quality & weight and phytosanitary certificate (90) by China Entry & Exit Inspection and Quarantine authorities shall beprovided to the Buyers.The quality and weight certified in the certificates are to be taken as final.

A．on

B．below

C．in

D．There
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