单项选择题

Theprimarywindingisconnectedto().

A.thepowersource
B.theload
C.themeasurementinstrument
D.themotor
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WhichoftheseisNOTincludedinchronicdisease?()
A.asthma
B.chickenpox
C.diabetes
D.coronarydisease
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Pleasetheinstructionswhenyoutakethemedication.()
A.read
B.learn
C.follow
D.use
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