That boy is Simon. And the girl next to _____ is Amy. [ ]
A. he
B. his
C. him
D. she
答案:C
在环境敏感点(区)分布图中标注污染源点位有助于选择()。
A.监测因子
B.预测因子
C.环境质量现状监测点
D.预测计算点
人工后牙半解剖式牙尖斜度为
A.0°
B.10°
C.20°
D.30°
E.40°