如果数据链路层能够为两个网络层的对等实体提供数据传输服务,那么对于两个网络层需要通信的对等实体来说就存在着一个虚拟数据路径。
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Which of the following features best describes Kennedy's Inaugural Address?
A. Informative
B. Persuasive
C. Inclusive
D. Argumentative
What does Kennedy mean by saying that "the world is different now" according to Paragraph 2?
A. Man is more able to build or destroy the world.
B. Countries in the world are more politically split.
C. The world situation is more intricate and turbulent.
D. The world is more advanced in science and technology.
What is the United States' general policy towards its adversary according to the address?
A. To cooperate while reserving differences.
B. To appeal to controlling modern weapons.
C. To seek a new balance of power by arms race.
D. To take a hard line on the problems dividing them.
What does the "endeavor" in"The energy, the faith, the devotion which we bring to this endeavor will light our country"(Line 116 Paragraph 24) refer to?
Assuring a more fruitful life for all mankind.
B. Serving the country by doing whatever it asks.
C. Defending freedom when there is danger of losing it.
D. Forging a global alliance against the common enemies.
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