题目内容
The ____ of nursing staff to doctors is 2:1.
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There is an ____way to prevent contamination of meat in our processing plants -- irradiation.
Sichuan, located in west China, is known as the "Land of ____", not only rich in rice and also famous for its sericiculture.
The study of language learnability is not oriented to whether language is learnable but to explaining how the language _____ device does its work.
The paper gives a retrospect and prospect of the construction of Chinese classical dance, narrates and analyzes the _____ fact and points out the essence.
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