A:64°
B:66°
C:74°
D:86°
下列关于荒漠化的叙述,正确的是 ( )
A. She went cycling in the nature park.
B. Three years ago.
C. Yes, there were.
D. No, there wasn't.
E. There was a small house many years ago.
人的胚胎在发育过程中,怎样获得营养和排出废物? ( )