假面砖面层灰厚应为3—4㎜。
参考答案:对
His father is a teacher and his mother is a teacher ______. .
A.as well
B.either
C.also
D.too
下述氨苄西林的特点不正确的是
A.耐酸、口服可吸收B.脑膜炎时脑脊液中浓度较高C.对革兰阴性菌有较强抗菌作用D.对耐药金黄色葡萄球菌有效E.对铜绿假单胞菌无效