He was late this morning _____ he got up late. [ ]
A. so
B. because
C. but
D. or
答案:B
颅内出血,颅内压增高时可出现()
A.血压增高,呼吸浅慢
B.血压下降,呼吸浅慢
C.血压增高,呼吸深大
D.血压不变,但呼吸抑制
E.血压下降,呼吸深大
目前我国自来水厂内常用的无机混凝剂有哪些?常用的助凝剂有哪些?