一些装有化学物质的瓶子上常贴有危险警告标签，下图是一些危险警告标签，则装有BaC

Eighth-grader Victoria Bills is talking about money with her classmates. She is worried that a company’s stock (股票) price could fall. It may be an unusual topic of conversation for a 13-year-old. But at Bills’ school in Chicago, US, you hear it all the time.

The Chicago school’s 420 students learn about economic(经济学). They also get a chance to make money. Each 1^st grade and 5^th grade, students learn the basics of economics and investing(投资).

Then in 6^th grade, they put what they’ve learned to work. Students join a junior group that manages the $20,000. The group, made up of 12 to 14 students, decides which stocks to buy.

After graduating, students pass on $20,000 to the next 1^st grade class. They keep half of the rest of the money; the other half goes toward improving the school. They can choose to put their money in a college-savings program or take the cash.

In 2007, Bills suggested that her class buy the stock of the Apple computer company. This was just before the iPhone came out. “We bought stock just at the right time,” she says. The kids bought Google stock as it reached $400 a share. It is now worth over $500. “It was a good buy,” says Myles Gate, 13. He hopes to be a banker one day.

The school’s two graduating classes of 2005 and 2006 have each earned about $10,000 in profits(利润).

小题1: At Bills’ school, students can’t       .

A．learn the basics of economics

B．learn how to invest money

C．get a chance to make money

D．share all the money they make小题2: Who manages the $20,000 in the class?

A．The teachers.

B．The school.

C．The students.

D．The parents.小题3:Google stock the kids bought has reached more than ______ at present.

A．$500

B．$400

C．$10,000

D．$20,000小题4:According to Paragraph 5, we know that       .

A．Bills’ class bought the Apple stock after the iphone came out

B．it was a mistake for the class to buy Google stock

C．the students get some investing experience in the school

D．the class bought the two kinds of stocks at the same time小题5: What’s the passage mainly about?

A．How students make money in the US.

B．Students learn economics and investing at school.

C．Myles Gage hopes to be a banker one day.

D．What US students hope to do after graduation.

慢性盘状红斑狼疮属于（）

A.固有层以T淋巴细胞为主的炎症细胞浸润

B.固有层或黏膜下层有淋巴滤泡形成

C.上皮下结缔组织中血管内发生玻璃样变、血管周有淋巴细胞浸润

D.上皮内发生棘层松解和上皮内疱形成

E.上皮基底细胞极性消失

焊芯的分类是根据现行国家标准《焊接用钢丝》的规定分类的，用于焊接的专用钢丝可分为（）。

A．非碳素结构钢钢丝

B．碳素结构钢钢丝

C．合金结构钢钢丝

D．不锈钢钢丝

嗜中性粒细胞的主要功能是（）。

A.变形运动

B.吞噬作用

C.产生抗体

D.凝血作用

E.参与超敏反应

当今，我国的网络安全工作面临新的复杂形势，网络安全面临新的挑战，体现在（）。

A.网上、微博中的大V、造谣、煽动

B.贫富差距已经就业住房等问题

C.社会发展不平衡

D.人们的思想意识、价值观、道德观多元化