[多项选择]《机场使用手册》的使用人员发现手册存在下列哪些情况时，应当及时按程序告知机场管理机构。（）
A. 民航局、民航地区管理局要求修改的
B. 机场基础设施等发生变化，与手册内容不相符的
C. 执行过程中，手册对同一事项的表述容易产生歧义的
D. 手册规定的内容不能保证机场的设施设备得到有效维护的
E. 手册规定的内容不能全面反映运行安全管理要求的

A land free from destruction, plus wealth, natural resources, and labor supply all these were important (21) in helping England to become the center for the Industrial Revolution. (22) they were not enough. Something (23) was needed to start the industrial process. That "something special" was men, (24) individuals who could invent machines, find new (25) of power, and establish business organizations to reshape society.
The men who (26) the machines of the Industrial Revolution (27) from many backgrounds and many occupations. Many of them were (28) inventors than scientists. A man who is a (29) scientist is primarily interested in doing his research (30) . He is not necessarily working (31) that his findings can be used.
An inventor or one interested in applied science is (32) trying to make something that has a concrete (33) . He may try t
A. origins
B. sources
C. bases
D. discoveries

Sometimes people feel the cost of using a human translator is too great. They decide to use a machine translation program instead. There are a variety of such programs available, including some that offer their services online. But the best that can be said for them is that they are not very good. I used one of the well-known online machine translation programs to perform a test.
I wanted a sample of English text that was relatively easy to understand, so I chose this passage from a book for foreign students to study English:
Original English: The Golden Gate Bridge is a beautiful bridge. It is a suspension bridge in San Francisco. The bridge opened in 1937.
I then ran the text through the translator three times -- once for Simplified Chinese, once for Japanese, once for Korean. I took the results for each language and ran them back through the same translator to translate back to English. These are the results:
Simplified Chinese: The gold