王大爷在花盆中种了一棵橘子,他每年春天都为橘子换一次新土,其原因是[ ]
A.花盆中的土壤被植物吸收了
B.土壤中肥料太少
C.土壤中缺少无机盐
D.土壤中缺少有机物
答案:C
Yesterday my teacher __________ ill, and we went to the hospital to visit her.
A. was
B. is
C. were
D on
黄芩的功效是()
A.补阳益阴,固精缩尿,明目止泻,安胎,生津
B.祛风湿,补肝肾,强筋骨,安胎
C.清热燥湿,泻火解毒,止血,安胎
D.补气健脾,燥湿利水,止汗,安胎
E.补肝肾,强筋骨,安胎