原式=-847-712-637-312
=(-847-637)+(-712-312)
=-15+(-11)
=-26.
The student’s mind is always _____ when he listens to his teacher.
A.wondering
B.wandering
C.wondered
D.wandered
某老人行走时突然跌倒,神志不清,即送医院。经检查发现一侧上下肢瘫痪,口斜眼歪,一侧瞳孔直径5mm,另一侧瞳孔直径 3mm,其原因是
A.颅内压增高
B.脑动脉血栓形成
C.脑疝
D.脑膜炎
E.脑肿瘤