我国某边防站(海4900米)的驻防官兵在艰苦的条件下,为改善生活试种蔬菜。他们先盖起简易阳光房,但种的蔬菜仍不能生长。后来,他们又在简易阳光房中搭架,架上盆栽,终于有了收获。回答: 3、盖简易阳光房改造的自然条件主要是:( ) A、热量 B、水分 C、土壤 D、光照 4、在简易阳光房中再搭架盆栽,蔬菜才能生长,解决的问题是( ) A、蒸发量大 B、多虫害 C、地温低 D、太阳辐射强9.What does Mary have to do on Saturday?A.She has to go to the doctor.B.She has to prepare for the coming English exam.C.She has to help her parents.