In one day, Brandon can either plow 10 acres or plant 20 acres. In one day, Christopher can either plow 14 acres or plant 14 acres. Brandon and Christopher can A: gain from exchange if Brandon specializes in planting and Christopher specializes in plowing. B: gain from exchange if Brandon specializes in plowing and Christopher specializes in planting. C: exchange, but only Brandon will gain from the exchange. D: exchange, but only Christopher will gain from the exchange.

America was named after Christopher Columbus.

Christopher Columbus discovered America in 1492.

3. Shortly after Christopher was operated on, __________.

Faustus is a character created by Christopher Marlowe.

Christopher Columbus was the first person to cross the ( ) Ocean.

christopher agrees that B is an awesome score for a restaurant

Washington D.C. is named after . A: the U.S. President George Washington B: Christopher Columbus C: both George Washington and Christopher Columbus D: none of them

f(st): st[]=st={:,:} f(st) (st[],st[]) 结果是

冯卡门提出卡门涡街是受到圣·克里斯朵夫(St.Christopher)抱着幼年的耶稣涉水过河图画的启发