（）不属于项目的活动 A.罐头产品的生产 B.一种新型罐头产品的发展 C.罐头产品的

在教育发展史上，首次明确提出“美育”一词的是( )

A．王国维
B．蔡元培
C．席勒
D．斯宾塞

根据玻尔理论，氢原子核外电子在n=1和n=2的轨道上运动，其运动的[ ]

A．轨道半径之比为1：4

B．动能之比为4：1

C．速度大小之比为4：1

D．周期之比为1：8

根据《公司法》，以下说法正确的是 ()

A．公司合并和分立都应当编制资产负债表和财产清单

B．公司合并和分立都应当自作出决议之日起10日内通知债权人，并于30日内在报纸上至少公告三次

C．公司合并或分立，债权人自接到通知书之日起30日内，未接到通知书的自公告之日起45日内，可以要求公司清偿债务或者提供相应担保

D．公司不清偿债务或者不提供相应担保的，公司不得合并或分立

某引水发电工程地下厂房跨度30m、地下压力管道水头为400m、厂房最大埋深为360m，在初步设计阶段除查明主要软弱结构面的分布和组合情况外，还应查明的主要内容不包括（）。

A.洞室地段基础岩体的承载力

B.洞室地段的地温情况

C.压力管道段岩体的高压渗透特性

D.洞室的岩体应力情况

American Museum of Natural History is one of the largest natural and historic museums in the world and one of the main natural history research and education centres in the United States, set up in 1869 and located in the west of the Central Park, Manhattan District, New York. It (1) 7 hectares in its total area, (2) classical types of buildings. The (3) of ancient creatures and humanity is (4) the first place of all the museums in the world, (5) the representative samples from South America, Africa, Europe, Asia and Australia were collected, besides those from the (6) country, the United States.

In the museum, there are five kinds of exhibits, including astronomy, mineralogy, human history, and animals in the (7) times and those in modern times. There are thirty-eight exhibition halls with different (8) from 500 to 1,500 square metres. Besides these, there is a Roosevelt Memorial Hall in (9) of President Roosevelt who supported the (10) of the museum, which is also used to have a special exhibition, showing the new important (11) on natural sciences and (12) affairs and social problems, and special topics connected closely with the life of the citizens. Besides this, it is also used for avocation (13) to have all kinds of scientific activities in the laboratories, centres of natural science and centres for citizens. There are more than 10 (14) research departments mainly (15) for collection of samples, research and work of publication.

In the museum, there are (16) and sub-libraries of Aulspond ancient amniote, with about 300 thousand books and magazines (17) natural history, many of (18) are very valuable monographs for the first edition. It has published many expert books and magazines, and a large number of propaganda materials, (19) which are the two magazines, Natural History and Members of Museum that have the biggest (20) of their magazines.

15（）

A.evident

B.reliable

C.responsible

D.excessive