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【单选题】
以下关于病毒说法错误的是（）。A.
有的病毒发作要在特定的时间
B.
病毒可以自我复制，并产生各种变形
C.
所有病毒对硬件伤害
D.
病毒在本质上是一种软件
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举一反三
【单选题】Which of the following is NOT included in the present space tourism?
A.
Visits to museums.
B.
Visits to space camps.
C.
Visits to rocket-launch recovery sites.
D.
Low-gravity aircraft trips.
【单选题】By aggregating and charting visits to the antidepressants sites, the author intends to ______.
A.
expound the reason why the spike in traffic to those sites takes place in late October
B.
verify the conclusion about when the peak of 'depression' is
C.
make a comparison between the different conclusions reached in Paragraph 2 and 3
D.
state the fact that people can anticipate their holiday depression
【简答题】It is tested ineffective that if a person with depression frequently visits doctor but without ______ in symptoms.
【简答题】_________________of anyone to spend New Year’s Eve with, I went to watch a show alone and I truly enjoyed it.
【简答题】Who visits customers to show them samples?
【单选题】It can be inferred from the passage that the future of online visits will mostly depend on whether ______.
A.
the employers would remain confident in them
B.
they could effectively replace office visits
C.
HMOs would cover the cost of the service
D.
new technologies would be available to improve the E-health project
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