叙述采用光学自动设计软件进行光学系统设计的基本流程。

（）

A．

B．

C．

D．7

Fucheng Garden Villas is situated along the North 4 th Ring Road , just 2 kilometres east away from the Asian Games Village with easy traffic connection. It is 5 kilometres from the Beijing Lufthansa Centre.

Fucheng Garden Villas occupies an area of 34.7 hectares, over 80% of which is covered by trees and green, just like a garden in the city.

All the 108 villas were designed by American Company IDI, in American style, luxurious besides comfortable.

All materials of the construction and decoration as well as equipment are famous American products.

From now to July 31st, preferential（优惠）prices for sale and rent are offered. You can move into Fucheng Garden Villas on signing an agreement.

Bank will provide a 50％ mortgage（抵押）for 5 years.

Overseas sales License: NO. 124.

Developer: Beijing Hongda Read Estate Co. Ltd.

60East, North 4th Ring Road, Chaoyang District, Beijing.

Tel:（8610）64967050  64967049

Fax:（8610）64933575

（From Wednesday, June 25, 1997 CHINA DAILY）

小题1:The advertiser is _________.

A．Fucheng Garden Villas

B．American Company--IDI

C．Beijing Hongda Road Estate Co. Lid

D．The Beijing Luftthansa小题2:How many hectares is Fucheng Garden Villas covered by trees and greens?

A．6.94

B．More than 27.76

C．27.76

D．80%小题3:According to the advertisement, which of the following statements is NOT true?                                

A．From June 25 to July 31, 1997, you can buy or rent the Fucheng Garden Villas with a low price.

B．You can’t move into Fucheng Garden Villas before signing agreement

C．If you haven’t got enough money at the moment, you can’t buy the Villas

D．Not only equipment but also all materials of the construction and the decoration are made in America

回转窑生产过程中，出现窑内结圈现像时，窑尾负压值会（）

A、增大

B、减小

C、不变

D、时大时小

烟叶分级回潮达到烟筋稍软不易断，手握叶片（）不宜碎为宜。

用A、B、C、D四种酸进行下列实验：

①pH＝a的酸A，与pH＝b的NaOH溶液等体积混合，混合后测得溶液的pH＝7，且a＋b>14

②B与NaCl不反应，能与Na₂CO₃反应生成CO₂

③向浓度为10^－3mol·L^－1的C溶液滴加甲基橙试液时，溶液变成黄色

④酸D的钠盐不止一种，向两种D的钠盐水溶液中分别滴加紫色石蕊试液时，一个显红色，一个显蓝色

从上述实验数据和现象中，可以用来确定是弱酸的实验是(　　)

A．①③④   B．②③

C．②③④                          D．全部