合理的浇水是新建草坪成功的（）。
A、前提
B、措施
C、目的
D、关键
参考答案：D
He had his leg in the accident and was sent to the nearest hospital at once. [ ]
A. injuring
B. injured
C. injure
D. to have been injured
模板DNA的获得包括（）
A.石蜡包埋组织
B.新鲜组织
C.体液
D.血液
E.以上全部
