北京2008年奥运会的奥运火种取自于西方文明的发源地,西方文明的发源地是指( )
A:古代埃及
B:古希腊
C:古巴比伦
D:古印度
函数y=sinx+cosx的最小值和最小正周期分别是 ( )
A: —I'm ____ (sad; excited) because we're going to climb the mountain.
B: —That's ____(grey; great).
A: —I'm ____(scared; tired).
B: —Why are you scared?
A: —Because she's going into the cave. I heard a____ (toys; noise).
B: —Be careful!