搜题请搜索小程序“爱下问搜题”
问题 多项选择题

含有氢化噻唑环的药物有

A．氨苄西林

B．阿莫西林

C．头孢哌酮

D．头孢克洛

E．哌拉西林

答案

参考答案：A,B,E

解析： 本题考查含氢化噻唑环的药物。 氨苄西林、阿莫西林、哌拉西林均为β-内酰胺类抗生素，所以都含有氢化噻唑环。头孢哌酮和头孢克洛均属于头孢菌素抗生素，均含有氢化噻嗪环。

单项选择题

(Ⅰ)

In the dining room of my grandfather’ s house stood his heavy clock. Meals in the dining room were a (21) for our four generations to become one. My grandfather’ s clock always stood like a trusted old family friend, (22) us playing jokes and tellingstories, which was already a (23) of our life.

When I was a child, the old clock interested me. I watched and listened to it during (24) I was surprised how at (25) times of the day, the clock would strike three times, six times or more, with a wonderful great (26) that echoed throughout the house. The clock chimed year after year, a part of my (27) , a part of my heart.

Even more (28) to me was my grandfather’s special action each day. He meticulously (29) the clock with a special key each day. The key was magic to me. It (30) our family’ s magnificent clock ticking and striking all year round.

29（）

A. opened

B. wound

C. turned

D. started
查看答案
单项选择题

对于新材料、新工艺、新结构形式的结构构件和跨度较大的屋架、桁架等结构构件，在使用状态短期试验荷载作用下的持续时间不宜少于（）

A.24h

B.18h

C.12h

D.30min
查看答案