较适合胸、腹部伤口包扎的急救材料是（）
A.纱布
B.四头带
C.绷带
D.三角巾
E.伤员衣裤撕成的布条
参考答案：B, D
The earliest form of artificial lighting was fire, which also provided warm and protection.
A．hot
B．sunshine
C．warmth
D．safe
古无舌上
