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【单选题】
一国两制的核心是()A.
一个中国原则
B.
和平统一，不适用武力
C.
高度自治
D.
两制并存
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皮皮学刷刷变学霸
举一反三
【单选题】What should be done to prevent insects from eating into the water harvesting system at the bottom?
A.
The two bags holding the water should be put inside the metal tank.
B.
The inner bags need to be replaced every two years.
C.
The water harvesting system should be built on a platform.
D.
A cover should be used to prevent insects from eating it.