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【单选题】
求一个逻辑函数 L 的对偶式 时,下列说法不正确的是 .A.
把L中的“与”换成“或”，“或”换成“与”
B.
常数中的“1”换成“0”，“0”换成“1”
C.
保持中的运算顺序不变。
D.
原变量换成反变量，反变量换成原变量。
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举一反三
【单选题】Which is the topic sentence of the passage?
A.
The first sentence of the passage.
B.
The third sentence of the passage.
C.
The last sentence but one of the passage.
D.
The last sentence of the passage.
【单选题】According to the passage, what is the population of the time when the passage is written?
A.
200 million.
B.
300 million.
C.
400 million.
D.
500 million.
【单选题】Passage Two Questions 20 to 22 are based on the passage you have just heard. 听力原文 Passage Two While Gail Opp-Kemp, an American artist, was giving a speech on the art of Japanese brush painting to an a...
A.
The art of Japanese brush painting.
B.
Some features of Japanese culture.
C.
Characteristics of Japanese artists.
D.
The uniqueness of Japanese art.
【简答题】Questions14 to 16 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage. This passage is most probably intende...
【简答题】Listen to the passage carefully and choose the best answer according to the passage. The passage will be given twice. 1. Mrs Clarke wanted to buy a watch for ________. [ ] A. her son B. her husban...
【单选题】Which of the following is not true according to the passage? ______.
A.
The passage mainly talks about doctors in Taiwan
B.
The passage mainly deals with the students with doctor degrees in Taiwan
C.
The doctors in Taiwan are richer than people who do other jobs
D.
Doctors are accused of to get money from patients
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