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【单选题】
下列咳嗽、咳痰护理措施中,错误的是A.
保持室内空气清新、清洁
B.
咳嗽患者注意口腔护理
C.
痰稠不易咳出时饮水
D.
痰多体弱无力咳嗽者施行体位引流
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举一反三
【单选题】Patrick lives near two gas stations, Exxon and Shell. If Exxon decreases the price of gas, we predict that the quantity of gasoline demanded at Shell will
A.
decrease because Exxon and Shell gas are complements.
B.
decrease because Exxon and Shell gas are substitutes.
C.
increase because Exxon and Shell gas are substitutes.
D.
increase because Exxon and Shell gas are complements.
E.
not change Exxon and Shell are different brands of gasoline.
【单选题】Most people ____ material possessions.
A.
chase away
B.
chase after
C.
chase about
D.
chase down
【简答题】这些问题与Hershey-Chase实验有关：
【单选题】Look ! There are some people _______ a thief. [ ]
A.
chase
B.
to chase
C.
chasing
D.
chased
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