人是由森林古猿进化而来的,这是事实.(判断对错)
⑴Christmas Day ____ A. March 12th
⑵Tree-planting Day ____ B. October 1st
⑶Teachers' Day ____ C. December 25th
⑷National Day ____ D. September 10th
⑸New Year's Day ____ E. January 1st
气体交换的场所是
百分之五十六写作____,计数单位是____,它有____个这样的计数单位。