下列哪项不属于继发性视神经萎缩的原因()
A.视网膜色素变性
B.球后视神经炎
C.视 * * 炎
D.青光眼
E.视 * * 水肿
参考答案:B
下列人类活动会使空气污染指数上升的是
①秋后农民在田里烧秸秆 ②城市私家车数量增多
③许多家庭用煤炉生火做饭 ④人们在房前养花种树
A.①②③
B.②③④
C.①②④
D.①③④
I think only when he attends college _______________ more independent of his parents.
A.will he become
B.he becomes
C.he will become
D.becomes he