氟喹诺酮类药物最适用于（）
A.骨关节感染
B.泌尿系感染
C.呼吸道感染
D.皮肤疖肿
E.全身感染
参考答案：B
—Did you see "Gossip Girl" last night?
—Yes. Leo fell _______ love _______ Gina while she was mad _______ him. Isn't that amazing! [ ]
A. in, and, at
B. at, with, in
C. in, at, with
D. in, with, at
某输油管线φ7mm×273mm，操作温度为50℃，施工温度为10℃，该管线材质α=235，其温度应力δt等于（）。
A、98.88MPa
B、95.88MPa
C、97.88MPa
D、99.88MPa
