明朝时,以下哪一官职兼管对臣民的监视、侦查[ ]
A.殿阁大学士
B.锦衣卫
C.布政司
D.都司
答案:B
—How was your interview with the famous basketball player-Yao Ming?
—I was quite nervous at first, but his warm smile put me____. [ ]
A. in action
B. at ease
C. on work
D. on watch
说明微观演化和宏观演化的区别?