【多选题】以下关于一对齿轮啮合的画法,说法正确的是( )。
【单选题】凯恩斯理论是在什么时候的经济危机下诞生的?
【简答题】The sound of the explosion died away, but it still reverberated in everyone's ears.(para.13)
【单选题】The author cites Mr.Cook‘s words in Para 1 in order to__________. 查看材料
A.
show how popular iPhone is
B.
show how much money Apple makes
C.
reveal how smart chief executives are
D.
reveal how the company is run