A:南半球的信风带与北半球的信风带
B:北半球的极地东风带与南半球的极地东风带
C:南半球的信风带与南半球的极地东风带
D:南半球的中纬西风与北半球的中纬西风
已知f(x)=lg(x+x2+a)•sinx为偶函数,则函数g(x)=bx﹣a(b>0且b≠1)的图象经过定点( )
根据表格内容,选择正确答案。
(a)This is Mariah Carey. She is a singer. She was born in 1970. Her birthday is March twenty-seventh. She likes singing.
(b)This is Lee Young Ah. She was born in 1971. Her birthday is January thirty-first. She is a great(著名的)movie star. She likes acting.
(c)She is ZhangYining. She's a sports star. She was born in Beijing in 1981. Her birthday is October fifth. She likes singing.
(d)Do you know Bill Gates?He was born in 1955. His birthday is October twenty-eighth. He likes playing golf (高尔夫球).
(e)This is Li Lianjie. He was born in Beijing in 1963. His birthday is April twenty-sixth. He is a great actor. He likes reading.
一个人先后用同样大小的力F将不同质量的物体分别在光滑水平面、粗糙水平面和粗糙斜面上沿力的方向移动相同的距离S(如图2所示),该力在这三个过程中所做的功分别为W1、W2、W3,关于它们之间的大小关系说法正确的是( )