防护林适地适树的标准是（）等三方面。
A、具有较好的防护作用和能够稳定生长
B、果品产量高
C、木材产量高
D、有经济效应
参考答案：A
After he became conscious, he remembered ______ and ______ on the head with a rod. [ ]
A. to attack; hit
B. to be attacked; to be hit
C. attacking; be hit
D. having been attacked; hit
肛周伤口反复感染，破溃伴少量溢脓是（）
A、肛裂
B、肛瘘
C、内痔
D、外痔
E、直肠息肉
