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【单选题】
“课程”一词在我国始见于 ______。 ( )A.
清朝
B.
宋代
C.
唐代
D.
明朝
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【单选题】Warm People Likely to Keep Cold at Bay Staying positive through the cold season could be your best defense against getting ill, new study findings suggest. In an experiment that exposed healthy volunt...
A.
that their illness is very serious
B.
that their illness is not so serious
C.
that they do not get any illness at all
D.
that the illness they get is not a mild one
【单选题】Warm People Likely to Keep Cold at Bay Staying positive through the cold season could be your best defense against getting ill, new study findings suggest. In an experiment that exposed healthy volunt...
A.
that their illness is very serious
B.
that their illness is not so serious
C.
that they do not get any illness at all
D.
that the illness they get is not a mild one
【单选题】Drinking water , having a healthy snack and taking exercise are all positive ways to ____you when you are working on a tight schedule.
A.
relieve
B.
refresh
C.
liberate
D.
comfort
【单选题】Which statement is true about positive feedback loops?
A.
Positive feedback loops are usually responsible for creating spectacular market tops and bottoms.
B.
Positive feedback loops are not self-sustaining and are regarded as unstable.
C.
Positive feedback loops are self-promoting.
D.
All of the above.
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