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问卷中对问题的回答不提供任何具体答案，而由被调查者自己任意填写的问答类型是__________。
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皮皮学刷刷变学霸
举一反三
【单选题】A) To carry out a scientific survey. B) To establish a new research station. C) To rescue two sick American workers. D) To deliver urgent medical supplies.
A.
To carry out a scientific survey.
B.
To establish a new research station.
C.
To rescue two sick American workers.
D.
To deliver urgent medical supplies.
【简答题】Questions 3 and 4 are based on the news report you have just heard . 3. ________ A ) To carry out a scientific survey . B ) To establish a new research station . C ) To rescue two sick American worker...
【单选题】The author mentioned many inventors in the first paragraph to______.
A.
remind American of their historical heritage
B.
highlight American' s loss of supremacy in scientific innovation
C.
describe the heyday of America in science and innnovation
D.
express his regret for the decline of American national power
【简答题】在幂法的迭代公式 中,当向量 和 的各个分量 时, 是 特征值的近似值, 是相应的特征向量。
【单选题】下列关于教师仪容礼仪的理解，正确的一项是
A.
仪容只要追求朴素的自然美，不需要修饰
B.
教师的职责是教书育人，不需要追求仪容美
C.
男女教师都应该养成自我修饰仪容的好习惯
D.
教师仪容整洁与否不会影响学生对教师的评价
【简答题】Read the article below from the magazine Scientific American. Underline the key facts in Para. 2-4. The first paragraph is done for you as an example. Centuries of silence cannot keep ancient mummies ...
【单选题】The main purpose of this passage is to_____．
A.
restore American students’interest in science
B.
keep American alert to the rise of other nations
C.
warn American of the decline of their scientific edge
D.
urge government to invest more in education and research
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