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搜题
【单选题】
一般认为腰椎牵引时,所需克服摩擦力的摩擦系数约为A.
0.3
B.
0.4
C.
0.5
D.
0.6
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The critics of food desert hold the view that______.
A.
USDA overemphasizes the importance of supermarkets
B.
shoppers should go outside their residence areas for food
C.
USDA should expand the census areas to locate food deserts
D.
shoppers should visit supermarkets more frequently
【单选题】What is the author's purpose in writing this article?
A.
To criticize the traditional view of the medical care.
B.
To compare the differences between the modern medical care and the traditional medical care.
C.
To tell us the change of the focus of medical care.
D.
To tell us the importance of the medical care.
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