蛛网膜下腔出血，剧烈头痛，脑压高，行腰穿最主要危险为（）。
A.诱发癫痫
B.诱发再出血
C.诱发脑梗死
D.诱发脑疝
E.诱发脑积水
参考答案：D
What do you think of the set of popular science books?-- It couldn't be better! It ______ many problems we are interested in exploring.[ ]
A. covers
B. consults
C. measures
D. writes
标示牌根据用途可分为（）和禁止类四类共8种。
A.警告类
B.允许类
C.工作类
D.提示类
