输注红细胞时输入量控制在每小时()体重。
A.1ml/kg
B.2ml/kg
C.3ml/kg
D.5ml/kg
E.10ml/kg
参考答案:A
当前大量物种灭绝或濒临灭绝,生物多样性正在不断减少。科学家调查了影响脊椎动物灭绝的常见原因,结果如表。其中对脊椎动物灭绝影响最大的是 ( )
A.生境消失
B.过度开发
C.物种引进
D.其他原因
— Would you like to see the menu? —()
A.No, thanks. I already know what to order
B.Your menu is very clear
C.I hear the food here is tasty