单项选择题

A．glance
B．view
C．watch
D．consideration
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单项选择题
Why did an officer want to give the dog a piece of mushroom
A．He was so pleased that he wanted to share the mushroom with it.
B．The dog would enjoy the mushroom.
C．He liked the dog very much.
D．He was afraid of mushroom poisoning and wanted to test the mushroom by the dog.
单项选择题
It can be inferred from the passage that scientists are currently making efforts to observe which of the following events
A．The decay of a vacuum in the presence of virtual particles.
B．The decay of a vacuum next to a super heavy atomic nucleus.
C．The creation of a superheavy atomic nucleus next to an intense electric field.
D．The creation of a virtual electron and a virtual positron as a result of fluctuations of a vacuum.
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