影响喷射混凝土强度的因素有()。
A.爆破效果
B.原材料
C.回弹率
D.隧道长度
E.施工工艺
参考答案:B, D
用适当的介词填空。
1. — Where is the park?
— It's ______ the hotel.
2. — Where is the apartment building?
— Go ______ this street and turn right. There's the apartment building.
3. — Do you live far ______ here?
— No. I live near here.
4. — Where is the office?
— It's ______ the stairs.
5. — Where does your father work?
— He works ______ a store.
肺炎球菌肺炎应首选()
A.青霉素类
B.氨基糖苷类抗生素
C.喹诺酮类
D.磺胺类
E.大环内酯类