以下属于德国产品安全认证GS特点的是（）A、自愿认证B、由经德国政府授权之独立之第三

螺旋CT扫描和非螺旋CT扫描最大的不同是

A．曝光参数

B．被检者体位

C．模数转换方式

D．数据采集方式

E．图像的后处理

控制哮喘气道高反应性最有效的药物是（）。

A.抗生素

B.β₂受体激动剂

C.胆碱能受体拮抗剂

D.糖皮质激素

E.H₂受体阻滞剂

Austin Children’s Museum

This 7,000-square-foot museum aims to entertain and educate children up to age 9. In its Global City exhibit, people can go shopping for groceries, order lunch at a diner, pretend that they’re doctors or construction workers, and more. In other fun exhibits, they learn about Austin’s history, explore the world of water, and experience life on a large Texas farm.

Open time: From Tuesday to Saturday, 10:00 am~ 5:00 pm

On Sunday, 12:00 am ~ 5:00 pm

Address: 201 Colorado St, Austin, Texas 78701

Phone: 512-4722499

Brooklyn Children’s Museum

Founded in 1899, it is the world’s oldest children’s museum, featuring interactive exhibits，workshops and special events. The Mystery of Things teaches children about cultural and scientific objects and Music Mix welcomes young virtuosos(名家)。

Open time: From Wednesday to Friday, 2:00 pm ~ 5:00 pm

On Saturday and Sunday, 10:00am ~ 5:00 pm

Address: 145 Brooklyn Ave, Brooklyn, New York 1213

Phone: 718-7354400

Children’s Discovery Museum

This museum’s hand-on exhibits explore the relationships between the natural and the created worlds, and among people of different cultures and times. Exhibits include Streets, a  5/8-scale copy of an actual city, with street lights, and waterworks, which shows how pumps can move water through a reservoir system.

Open time: From Monday to Saturday, 10:00 am~ 5:00 pm

On Sunday, from noon. Closed on holidays.

Address: 180 Woz Way, Guadalupe River Park, San Jose, California 95110

Phone: 408-2985437

Children’s Museum of Indianapolis

This museum is the largest of its kind. Exhibits cover science, culture, space, history, and explorations. Among them are the Space Quest Planetarium ( additional fee),the 33-foot-high Water Clock, the Playscape gallery for preschools, and the Dinosphere exhibit, along with hand-on science exhibits. The largest gallery, the Center for Exploration, is designed for ages 12 and up.

Open time: From Tuesday to Sunday, 10:00 am ~ 5:00 pm

Closed on Thanksgiving Day and December 25.

Address: 3000 N Meridian St, Indianapolis, Indiana 46208

Phone: 317-3343322

72. Suppose that December 25 is Tuesday, which of the following museums can you visit?

A. Austin Children’s Museum.  

B. Brooklyn Children’s Museum.

C. Children’s Discovery Museum.  

D. Children’s Museum of Indianapolis.    

73. If you want to see how pumps can move water through a reservoir system, you should visit the museum in ___.

A. Texas   B. New York   C. California   D. Indiana

74. After entering the museum, you need to pay an additional fee to see ___.

A. the Center for Exploration    B. the Space Quest Planetarium

C. the Global City exhibit       D. Waterworks

75. The purpose of writing this passage is to ___.

A. ask adults to visit museums   

B. compare some museums and decide which one is the best

C. introduce some museums and encourage parents to visit them with their children

D. introduce some exhibits and museums to foreigners

岩体工程力学性质的三项重要指标是（）、（）和（）。

物料需求计划MRP 是根据（）、主产品的结构文件(BOM)和（）而形成的。