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【简答题】
用数字0、1、2、3、4、5组成没有重复数字的四位数． （1）可组成多少个不同的四位数？ （2）可组成多少个四位偶数？ （3）将（1）中的四位数按从小到大的顺序排成一数列，问第85项是什么？
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【单选题】The best title for this passage would be _____.
A.
The Atmosphere and Our Environment
B.
Research on Radiation
C.
Effects of Space Radiation
D.
Importance of Protection Against Radiation
【单选题】It is implied that__________. 查看材料
A.
both the researchers and college students are worried about the trend of narcissism
B.
the researchers and college students disagree on the findings of the study
C.
the researchers and college students disagree on some of the findings of the study
D.
college students are pessimistic about their future
【简答题】酵母的2μm质粒有______，可以配对形成哑铃结构。
【单选题】One of the important properties of a scientific theory is its ability to_____further research and further thinking about a particular topic.
A.
invent
B.
stimulate
C.
renovate
D.
advocate
【单选题】According to the author,
A.
the investigation of the life cycle of a protozoon is pure research.
B.
applied investigation is looked down upon in modern society.
C.
the discovery of X-rays was made in applied research.
D.
the common classification of research is neither accurate nor impersonal.
【单选题】According to the passage, Redbox______.
A.
has a streaming-video service now
B.
has been researching its on-demand options
C.
has already launched its plan B
D.
has cooperated with Sonic Solutions
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