What does this passage mainly discuss？
A. The scarcity of manufactured goods.
B. The value of materials.
C. The manufacturing of scarce goods.
D. The cost of producing shoes.
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标志着印度第一次“非暴力不合作”运动超出了非暴力的限制。
A. 乔里乔拉事件
B. 白沙瓦起义
C. 旁遮普起义
D. 食盐进军
A．People with dogs did more exercise.B．Dogs lost the same weight as people did.C．Dogs
A. People with dogs did more exercise.
B. Dogs lost the same weight as people did.
C. Dogs liked exercise much more than people did.
D. People without dogs found the program unhelpful.
设f(x，y)为区域D内的函数，则下列各种说法中不正确的是()．
A．Try to eat less.B．Walk more quickly.C．Use the stairs.D．Avoid fast food.
A. Try to eat less.
B. Walk more quickly.
C. Use the stairs.
D. Avoid fast food.
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