According to the passage, energy is released in the Sun when ______.
A. helium atoms bind with each other
B. gamma radiation escapes from the spectrum
C. radiation is absorbed by helium
D. nuclei of hydrogen atoms collide
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The passage indicates that, in comparision to radio waves, gamma waves ______.
A. produce louder sound
B. are less magnetic
C. do not form in the Sun's center
D. are not long
Which of the following countries has tile most immigrants
A. The U.K.
B. The U.S.
C. Australia.
D. New Zealand
The two houses were not ______.
A. of the same style
B. designed by the same designer
C. the same looking from the outside
D. the same looking from the inside
在信息系统项目中，为了提高沟通的效率和效果，需要把握一些基本原则；其中不包括 (5) 。
A. 沟通内外一致
B. 扫除沟通的障碍
C. 沟通的升级原则
D. 非正式的沟通有助丁关系的融洽
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