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【单选题】
消毒用乙醇一般浓度为 ( )。A.
75%
B.
50%
C.
90%
D.
95%
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【简答题】What problems do the speakers identify for each experiment? Choose your answers from the box and write the letters A-H next to questions 1-5. Problems A. too messy A. too boring B. too difficult C. to...
【单选题】Too much _____ to dirty air can cause people to suffer from allergies and diseases that will ually affect people ’ s health.
A.
deficit
B.
efficiency
C.
proficiency
D.
exposure
【单选题】Too much ________ to dirty air can cause people to suffer from allergies and diseases that will ually affect people's health.
A.
expansion
B.
exposure
C.
extension
D.
exploration
【简答题】I don’t really like my town. Every summer, too many tourists come here, so there are ___1_____(A. too much; B. too many; C. not enough) cars in the streets, and that means there’s ___2_______ (A. too ...
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