在陆地生态系统中,生物种类多,结构复杂,自动调节能力强的是[ ]
A.草原生态系统
B.沙漠生态系统
C.农田生态系统
D.森林生态系统
答案:D
A party was held ______ the heroes who had helped save thousands and thousands of lives in
the big earthquake in Sichuan. [ ]
A. in time of
B. in place of
C. in name of
D. in honor of
男性,52岁。患急性阑尾炎,右下腹疼痛,高热,烦渴欲饮,呕吐不食,大便秘结,小便黄,舌红苔黄燥,脉洪大而数。治疗应首选青霉素加
A.阑尾化瘀汤B.黄连解毒汤C.阑尾清解汤D.阑尾清化汤E.大承气汤