单项选择题

A．Sandy.
B．Jack.
C．Her husband.
D．Her mother.
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单项选择题
Which of the following is the key factor that Dr. Ferrer and his colleagues added when disputing Dr. Hondon’’s research
A．The effect of the passengers themselves.
B．The validity of Dr. Hondon’’s model.
C．The bounds defined by the ICNIRP.
D．The sources of radiation.
单项选择题
What is the purpose of Sentence 3 in Paragraph 1
A．It states the main idea of the paragraph.
B．It supports the main idea by providing a reason.
C．It states an idea that is in contrast to the main idea.
D．It supports the main idea by providing an example.
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