当口腔唾液pH为5时,应选用的漱口液是
A.2%硼酸溶液
B.2%碳酸氢钠溶液
C.0.02%呋喃西林溶液
D.3%过氧化氢溶液
E.0.1%醋酸溶液
参考答案:B,D
Nowadays,more Chinese provinces________education reforms that will allow children of migrant workers to sit college entrance exams locally.
A.have announced
B.are announcing
C.announced
D.will announce
细菌引起化脓性脑膜炎的传播途径有()
A.通过血液循环
B.直接扩散
C.通过逆行的血栓性静脉炎
D.经脑脊液通路
E.空气传播