易燃类液体的特点有（）。
A、闪点在25℃以下的液体
B、极易挥发成气体
C、遇明火即燃烧
D、闪点越低，越易燃烧
参考答案：A, B, C, D
The doctor ______ and found there was something wrong with his eyes. [ ]
A. looked him after
B. checked him over
C. checked him about
大脑外侧裂形成下列哪几个脑叶的界缘（）
A.顶叶、额叶、岛叶
B.枕叶、顶叶、额叶
C.颞叶、枕叶、顶叶
D.颞叶、岛叶、枕叶
E.额叶、岛叶、颞叶
