颌面部创伤病员包扎的直接作用不包括()。
A.压迫止血
B.防止骨折进一步移位
C.保护并缩小创口
D.保证呼吸道通畅
E.减少污染,防止涎液外流
参考答案:D
A new way of teaching _____ in the article can make learning easier.
A.introduced
B.has introduced
C.was introduced
D.is being introduced
什么是柴油机的特性曲线?