以下哪种不属于非电离辐射（）。
A、激光
B、X射线
C、紫外线
D、红外线
E、可见光
参考答案：B
He was in the mountain for a year. He felt as if he was ______from the outside world. [ ]
A. cut out
B. cut off
C. cut up
D. cut through
0.9％NaCl溶液与血浆相同的是()
A．胶体渗透压
B．K＋浓度
C．Na＋浓度
D．总渗透压
