新种群也可能是起源于一个占有单一生境的种群，或者说是起源于一个种群的分布区域内，这种

“白色污染”这个概念是20世纪90年代初由我国提出来的，但是这一警示很快就得到国际社会的认同．“白色污染”是指

（　　）

A．冶炼厂的白色烟尘

B．石灰窑的白色粉末

C．各类塑料垃圾

D．白色建筑材料产生的建筑垃圾

吸入麻醉药

Geena David knew she wanted to be a movie star when she was very young. She was not sure what gave her the idea, but she wanted to look like a movie star. “I have a lot of pictures from my childhood of me wearing sunglasses,” she says. “I used to wear them to watch TV.”

　 Early movie actors started wearing sunglasses not because they looked good, but because their eyes hurt. The lights used on movie sets were extremely bright and could cause a painful problem known as “Klieg eyes”. It was named after the Klieg brothers who invented the lights. Actors wore sunglasses to give their eyes a rest. But when movie stars began wearing their sunglasses in public, they quickly became a must.

　 Eventually actors started wearing sunglasses in their movies as well as on the street. Audrey Hephburn wore ultra-cool Ray-Ban sunglasses in the 1961 movie, Breakfast at Tiffany’s. As a result, Ray-Ban sunglasses started to appear more and more in the movies. In 1979, Ray-Ban “Wayfarers” were worn by Jake and Elwood in The Blue Brothers. Tom Cruise wore Ray-Ban “Aviator” sunglasses in the 1986 hit, Top Gun. Then in 1997, Will Smith and Tommy Lee Jones made Ray-Ban “Predator” sunglasses famous in Men in Black.

　  Of course sunglasses aren’t just a fashion statement. The main reason to wear sunglasses is to protect our eyes against UV radiation. UV radiation can damage our eyes, so people now choose their sunglasses carefully. But you don’t have to give up style for safety. The choice of frames and lenses available these days is huge. So you can protect your eyes and still be the coolest person on the beach.

小题1:What is mainly discussed in this passage?

A．The use of sunglasses.

B．The history of sunglasses.

C．The sunglasses wearing.

D．Why movie stars like to wear sunglasses.小题2:Why did Geena David like to wear sunglasses?

A．She was a movie star.

B．She wanted to follow a movie star.

C．Wearing sunglasses was good to her eyes.

D．It was good to wear sunglasses when watching TV.小题3:Early actors’ eyes hurt because ______.

A．they wore sunglasses

B．they went out in the sun too much

C．the lights on movie sets were too bright

D．their scripts were written in very small writing小题4:Now people wear sunglasses ______.

A．just to protect their eyes

B．for fashion and to protect their eyes

C．because of bright lights

D．because movie stars wear them

客户向我行申请个人住房贷款，购买建筑面积100平方米的住房，则贷款最高额为购房总价款的（）。

A.60%

B.70%

C.80%

D.90%

装车前检查的内容有哪些？