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【单选题】
人体的触电方式( )A.
电击和电伤
B.
电吸和电摔
C.
立穿和横穿
D.
局部和全身
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【单选题】When Harrison's clock was first made,______.
A.
it could tell the time at sea
B.
it could tell sailors where they were
C.
both A and B
D.
every country in the world set the time by it besides A and B
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A.
It could provide rapid online responses to service requests.
B.
It could use Internet-based knowledge systems to shorten customer response times.
C.
It could automate purchasing and payment systems so that customers have detailed status reports.
D.
It could use Web-based inventory control systems that reduce storage costs.
【单选题】What did scientists find BIRR4 could do?
A.
It could change the cold cycle.
B.
It could strengthen the immune system.
C.
It could only treat a cold in the first stages.
D.
It could eliminate all possibilities of getting a cold.
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