按现行部颁规定，下列（）材料为装置性材料。A.机组本体上的梯子、平台和栏杆 B.电缆

（2010）下列房地产种类中，与写字楼之间存在一定替代关系的有（）。

A.经济适用住房

B.商住两用住宅

C.宾馆

D.普通住宅

E.娱乐房地产

(选做题)随着生物科学技术的发展，动物、植物乃至人类自身的生殖方式变得越来越多样化。既解决了一些社会的需求，也带来了一些社会的忧虑。请根据下列各种情况，回答有关问题：

(1)试管婴儿技术：解决了部分夫妻不育的难题或生育健康后代的要求。这种技术和母亲正常怀孕生产过程的相同之处是都是以____________________为发育起点，不同之处在于试管婴儿是在体外进行受精后，在试管中进行胚胎培养；最后选取健康的胚胎进行_______，保证生出健康的孩子。

(2)胚胎分割技术：可解决良种动物快速大量繁殖的问题；对囊胚阶段的胚胎进行分割时，要注意____________________________，否则将影响分割后的胚胎的恢复和进一步发育，如需做性别鉴定，还需从__________细胞取样做DNA分析。

(3)植物体细胞杂交技术：可以用来培育一些种间亲缘关系较近的杂交种，如白菜-甘蓝，实质上是利用了___________和____________两大关键技术来实现。

(4)利用基因工程培育转基因植物：如将富含赖氨酸的蛋白质编码基因导入玉米细胞中，可培育转基因高赖氨酸玉米。选用的表达载体可以是农杆菌的Ti质粒，是因为该质粒的T-DNA_________________；除农杆菌转化法外，还有____________法等。

阅读理解。

     Millions of Americans have been heading to the shops on Black Friday, a crucial event for US retailers. Many stores open their doors overnight, hoping to entice customers with cut-price bargains. Black Friday－the day after the Thanksgiving public holiday－is traditionally the start of the Christmas shopping season.

     Consumers are spending in an uncertain environment as fears about the health of the US economy

persist. Thousands of people queued late on Thursday evening in the hope of being the first to find a

bargain, with many shops offering deep discounts on clothing, electronic goods and toys.

     "Several chains opened even earlier than the typical midnight start. Children's retailer Toys R Us threw open its doors at 22:00 on Thursday for the first time. Others stayed open after trading on Thanksgiving

itself. Judging from the excitement at Toys R Us at 10 pm (on Thursday) and throughout the evening, the

shopper is back, " Toys R Us chief executive Jerry Storch told Reuters. Department store Macy's said it

had 7,000 shoppers outside its flagship Herald Square store in Manhattan in the early hours of Friday

morning, some 2,000 more than last year.

     Despite continued concerns over the US economy and a stubbornly high unemployment rate of 9.6%,

analysts are predicting a better holiday season than last year. The National Retail Federation says it expects sales to be 2.3% higher than 2009, to totalling $447m (285m). That could bode well for the US economy, with consumer spending making up about 70% of total economic output. "This is shaping up to be one

of the biggest Black Fridays we've seen," said David Bassuk, managing director at consulting firm Alix

Partners.

     Black Friday is so named because it is the day of the year when retailers traditionally hope to leave the "red" and enter the " black ", breaking even or making a profit.

1. What will happen after the Thanksgiving public holiday is over?

A. The white collars are feeling down.

B. The day will be black enough on Friday.

C. The fear of expenses will be caused.

D. The Christmas season is really coming.

2. What's the customers' hope during Christmas season?

A. To make a good deal with retailers.

B. To kill time by shopping overnight.

C. To buy more discounted things.

D. To enjoy the merry atmosphere.

3. What do most Americans concern about?

A. The worse situation which American economy is in.

B. The fear that they lose chance to buy cheaper clothes.

C. The profit that retailers will make during Christmas season.

D. The sale that is believed to be higher than last year.

4. What can be inferred from the fourth paragraph?

A. Americans are worried about inflation.

B. America's economy wouldn't inflation.

C. The sale this year is $ 447m higher than 2009.

D. Black Friday promises economic recovery.

5. What can we know from the last paragraph?

A. Black Friday got the name from a tale in history.

B. Black Friday often let most Americans down.

C. Black Friday drives most Americans crazy.

D. Black Friday is when retailers expect to make money.

引起女性生殖道感染最常见的病原体是（）

A.梅毒螺旋体

B.淋球菌

C.巨细胞病毒

D.单纯疱疹病毒

E.沙眼衣原体

选购和使用家用制氧机应注意哪些事项（）：

A、应在专业指导下购买和使用.

B、家庭辅助治疗用制氧机不得用于生命维持或生命保障.

C、须在医生指导下按照处方的每日使用时间和流速使用.

D、如果盲目吸氧，有可能对身体造成负面影响.