烘干后的碱性焊条应放在（）℃的保温箱（筒）内，随用随取。A、50～100 B、100

阅读下面短文，根据短文内容回答问题。

“Who needs a shopping mall (购物中心) if you have Taobao?” says Wang Lin, 28, a writer in Beijing.

Taobao, China’s largest online shopping site (网上购物网站), has become an important part of Wang Lin’s life. She spends lots of money on Taobao.

A growing number of Chinese Internet users like Wang have found the joys of online shopping. Most online shoppers are students or young workers. More women shop on line than men. Clothing and home-use products are the most popular on line.

It was reported that more than 250 billion（十亿）yuan was spent on online shopping last year, 80% through Taobao.

Taobao means “looking for treasure” in Chinese. People can find almost everything they need on Taobao, from clothes to books, from candies to DVD players.

You may question the security of online shopping, Wang Lin said, “It’s very safe and convenient. Unless you receive the products from the sellers and are satisfied with them, the shop owner will not get the money. You can also get your money back if you want to return the products.”

小题1:What is Taobao?

小题2:Who are the most online shoppers?

小题3:Do more men shop on line than women?

小题4:What can you do if you want to return the products?

小题5:How much did people spend on line shopping through Taobao last year?

（4分）科学研究中经常用模拟实验来解决不能或不便用直接实验法解决的问题，便于提高效率、获取证据.右下图是米勒模拟原始地球条件的实验装置，请据图回答下列问题：

米勒提出的问题：原始地球上的各种原始大气成分能够转变为有机小分子吗？

⑴米勒在模拟装置中采用火花放电的目的是          .

⑵装置a中气体是模拟原始大气，不包括的气体是（ ）

A．氢气     B．氧气    C．水蒸气     D．氨气

⑶米勒在实验中搜集到的证据是（ ）

A．产生了多种蛋白质等有机大分子

B．产生了多种氨基酸等有机小分子

C．产生了氧气

D．产生了核酸等有机大分子

⑷米勒得出的结论是                               .

图2-27为短周期元素组成的中学常见A—J 10种物质的转换关系。已知A、B、C、D均为单质，通常状况下只有A、C、D为气态。它们在一定条件下发生图示化学反应，得到E—J等化合物(图中物质的状态均为常温常压下)。

图2-27

有关反应的化学计量关系为:

①A与B按物质的量之比n(A)/n(B)=1/2完全反应生成G

②B与C按物质的量之比n(B)/n(C)=3/1完全反应生成F

③C与D按物质的量之比n(C)/n(D)=1/3完全反应生成E

请填空:

(1)构成上述物质各元素的离子中，电子层结构相同且按其离子半径由大到小排列的顺序是(用离子符号表示)_______________。

(2)物质G的电子式是____________，其化学键类型是____________。

(3)B和C反应生成F的化学方程式为______________________________________________。

(4)实验室中制取E反应的化学方程式为____________________________________________，干燥E时常用干燥剂的名称是____________。

(5)常温下将F投入J中可生成E和一种白色难溶物X，该反应的化学方程式为

______________________________________________；若将I通入J中可生成H和某物质Y，X与Y溶液可发生中和反应，该反应的离子方程式为_________________________________。

个性是指个体的（）

A.遗传素质

B.心理面貌

C.生理面貌

D.社会面貌

E.人际能力

简述信息资源配置的原则。