夹板固定后严密观察患肢血运情况应注意（）。
A.肢端动脉搏动
B.皮肤温度、颜色
C.伤肢感觉
D.肿胀、疼痛
E.以上都是
参考答案：E
1纳米=10-9米，相当于1根头发丝直径的六万分之一，头发丝的半径用科学记数法表示为（ ）
A．6万纳米
B．6×104纳米
C．3×10-6米
D．3×10-5米
Speaker A: Would you please close the window I feel a bit cold. Speaker B:______
A．All right. I hope someone will close it.
B．Oh, I'm sorry, but maybe you should put on your sweater. We need some fresh air.
C．Who has opened the window I feel cold too.
D．If you feel cold, you can put on more clothes.
