问题
单项选择题
一个立管所承接的多个雨水斗，其安装高度宜在同一标高层。当立管的设计流量小于其排水能力时，可将不同高度的雨水斗接入该立管，但最低雨水斗应在立管底端与最高斗高差的（）以上。
A.1/3
B.1/2
C.2/3
D.1/4
答案
参考答案：C
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一个立管所承接的多个雨水斗，其安装高度宜在同一标高层。当立管的设计流量小于其排水能力时，可将不同高度的雨水斗接入该立管，但最低雨水斗应在立管底端与最高斗高差的（）以上。
A.1/3
B.1/2
C.2/3
D.1/4
参考答案：C
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| After finishing working at the hospital that day, I was driving home after a particularly busy night call. In front of me was a public bus, with college students sitting on the roof, 1 a small metal railing (栏杆). As the 2 weaved through traffic, I could see the boys 3 from side to side. 4 , a boy fell off the back of the bus. He 5 the road face down, bounced once, and 6 . He lay 7 in the middle of the road as the bus sped away. The cars directly behind the bus 8 to avoid the boy, but none stopped. Part of me understood-if he died, it would mean police involvement and 9 problems. In fact, I felt the same willing to keep going, 10 the willing to stop and help was 11 . I knew that if the boy was bleeding into his brain, he could 12 in a matter of minutes. He had to get to hospital quickly. I stopped my car and carefully 13 the boy, who appeared to be about 20. His face was covered in 14 -he had a long deep cut on his forehead and another above his right ear. There didn't seem to be any other injuries. I 5 to apply pressure to the cuts to stop the bleeding but failed. With the 6 of some bystanders, I lifted his unconscious body into the back seat of my car. I asked a couple of men to 7 me, but they shrank away from further involvement, I jumped in the car and 8 to the hospital. On reaching the emergency entrance, I 9 , "Head injury!" Hospital staff wheeled the boy into the emergency room, while I gave a quick 10 to the on-call doctor. After an initial examination, the doctors determined that he was most likely bleeding into his brain. Luckily the boy was saved at last. | ||||
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