下列关于灰阶与 CT值关系的叙述,正确的是
B
暂无解析
In1995,anaverageof_______ofdomestictravelerswentonsightseeinginChina.
Touristexpenditureshavedifferenteffectsonadestinationeconomy:salesbyfoodvendorstorestaurantsare_______effect;whiletaxifaresandairlineticketsalesare_______effect.
Wewill______youassoonasthenewcropcomestothemarket.