内燃机的压缩比是指()。
A.燃烧室容积与气缸总容积之比
B.气缸总容积与燃烧室容积之比
C.气缸容积与燃烧室容积之比
D.内燃机工作容积与总容积之比
参考答案:B
已知一个球内切于圆锥. 求证:它们的全面积之比等于它们的体积之比.
Could you tell me ________?[ ]
A. what the food is made of
B. which the food is made
C. how is the food made
D. who the food is made