正常结点位置上没有被原子或离子所占据成为空结点叫空位。
参考答案:对
开心阅读屋。判断下列句子,正确的画“√”,错误的画“×”。
This is Lily's big classroom. There are three teachers and thirty-eight students in the classroom. In the
front of the classroom, there is a blackboard. A clock is near the blackboard. A computer is on the desk.
( ) 1. Lily's classroom is not big.
( ) 2. There are 35 students in Lily's classroom.
( ) 3. A computer is on the desk.
( ) 4. There are three teachers in Lily's classroom.
女,14岁,癫痫,1年前蛛网膜下腔出血,CT示右颞叶前部有斑点样高密度灶,中度强化并见曲张血管,最可能的诊断为
A.海绵状血管瘤B.星形细胞瘤C.动静脉畸形D.少枝胶质细胞癌E.动脉瘤