刚好在450英尺的等高线之下有3个缓坡。There were three moderate climbs to just below the 450 feet contour.等高线是用等间距图解描述构造形态的.Contours are graphic expressions with uniform spacing depicting a structure's character.正射摄影象片一般不带像地图所表示的等高线....
Recombinant BCG vaccine is a new type of vaccine of micro organisms.重组BCG疫苗是一种新型微生物疫苗.Objective: observing effecting of BCG amylose nucleic acid to treat bronchial asthma.目的: 观察卡介菌多糖核酸治疗支气管哮喘的效果.The estimated basic inocu...