通过招标投标订立的合同属于( )。 A．招标合同 B．邀请合同 C．要约式合同

母乳中的乙型乳糖可抑制肠道中（）。

A.乳酸杆菌的生长

B.变形杆菌的生长

C.大肠杆菌的生长

D.白色念珠菌的生长

E.葡萄球菌的生长

李先生，24岁。3小时前活动时突然出现剧烈头痛和喷射性呕吐。查体：神清，四肢肌力正常，脑膜刺激征（+）。

哪项护理措施不妥（）。

A.保持大便通畅

B.密切观察生命体征

C.限制探视

D.避免精神刺激

E.头痛时可遵医嘱给予哌替啶（度冷丁）止痛

某班同学围绕“转变经济发展方式”主题，以小组为单位展开探究性学习。甲组同学收集到当前我国经济发展中的一些信息。

表1：我国“三大需求”对经济的贡献率

注：目前世界各国“三大需求”对经济增长的平均贡献率：消费约为60%，投资约为30%，出口约为10%。

表2：我国与发达国家原材料消耗、资源利用与科技贡献率情况对比

（1）上述表格各反映了我国经济发展中的什么问题？请运用《经济生活》的相关知识，对实现经济又好又快发展提出针对性建议。

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（2）在甲组同学探究的基础上，乙组同学认为，加快经济发展方式转变，关键在于完善体制机制。请你运用《经济生活》的相关知识，说明应如何完善社会主义市场经济体制，推动经济发展方式转变。

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如图所示，正方形线圈abcd在磁感应强度B＝1T的匀强磁场中绕轴OO′以角速度ω＝10π rad/s匀速转动，线圈共10匝，线圈的电阻值为5 Ω，ab＝0.6 m，bc＝0.6 m，负载电阻R＝45 Ω.求

(1)电阻R在0.05 s内发出的热量；（结果保留两位小数）

(2)电阻R在0.05 s内流过的电荷量(设线圈从垂直中性面开始转动)．

阅读理解。

     BEIJING, Feb. 10 (Xinhua) -China's economic planning agency Thursday announced a rise in

minimum rice purchase prices this year to encourage farmers to grow more grain.

     A statement on the National Development and Reform Commission (NDRC) website said the

government would continue the policy of minimum purchase prices in major rice-growing regions in

2011.

     The rises in the minimum rice purchase price had been approved by the State Council, China's

Cabinet, said the statement. 

     The purchase prices for japonica rice will rise 21.9 percent to 128 yuan (19.4 U.S. dollars) per

50 kilograms, while prices for early and middle-late rice will increase 9.7 percent and 10.3 percent to

102 yuan and 107 yuan per 50 kg respectively.

     Rice and wheat are two major grain crops in China.

     The State Council pledged Wednesday to step up efforts to boost grain production as drought

continues to wreak havoc in north China's wheat growing regions.

     China's main wheat-growing regions, including Shandong, Henan, Hebei, Anhui, Shanxi, Shaanxi,

Gansu and Jiangsu provinces, have been plagued by drought since October last year.

     Drought has affected about 7.73 million hectares, or 42.4 percent, of the total winter wheat crop

area in the country's eight key producing provinces, the Ministry of Agriculture said Wednesday.

     China's grain output rose 2.9 percent last year to 546.41 million tons, marking the seventh

consecutive year of growth.  

1. When was this news probably written?

A. In 2011  

B.  In  2010  

C. In February,2011  

D. On Wednesday, 2011

2. What is the purchase price for japonica rice before it wise according to the passage?

A.105 yuan per 50 kilograms    

B. 128 yuan per 50 kilograms  

C. 102 yuan per 50 kilograms    

D. 107 yuan per 50 kilograms  

3. What is the meaning of the underlined word in the fourth paragraph?

A. completely  

B. honorably  

C. separately  

D. exactly

4. Which of the following sentences is true according to the passage.

A. A raised purchase price will encourage farmers to grow more rice.

B. The plan hasn't been approved by the State Council, China's Cabinet.

C. Drought continues to hit the wheat growing regions in the north of China.

D. There are 8 grain producing provinces affected by the drought.

5. Which may be the headline of this news?

A. China's minimum rice purchase prices raised to boost production

B. A Steady rice purchase prices to ensure rice production

C. The Chinese government pays more attention on rice production

D. China's grain output steadily increases