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问题 单项选择题

尾矿库最小安全超高为（），汛期为（），发现问题及时报告加以解决，防止垮坝并做好记录。

A、2米、1.5米

B、3米、1.5米

C、2米、0.5米

D、2米、1米

答案

参考答案：A

多项选择题

病历摘要：患者××，男性，32岁，小车司机，开车时小车正面碰撞路边水泥柱产生车祸致伤，出现右髋部疼痛、活动受限1小时。查体：右下肢呈屈曲内收，内旋和短缩畸形，右臀部隆起可触及股骨头，右髋关节活动障碍，其余未见明显异常。

髋关节脱位的合并症有哪些？（）

A.髋臼骨折

B.股骨头骨折

C.坐骨神经损伤

D.股神经损伤

E.闭孔神经损伤

F.股动静脉损伤

G.股骨头缺血坏死

H.创伤性骨关节炎
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单项选择题

A typical application of this (71) is ADSL. It is emerging as the technology for home-and small-office Internet connectivity. It provides either 1.5 Mb/s～8 Mb/s from the network to the user and 64 kb/s～512 kb/s in the reverse direction depending on the distance, 12000 or 18000 feet. The different speed for each direction gives it the (72) label. ADSL is designed to take advantage of the fact that video-on demand, telecommuting, and Internet access traffic are inherently asymmetrical. The user (73) a brief message up to the network and receives a ton of data coming back, either a movie or a piece of data download. Under such a scenario, low-speed traffic to the network is just fine. ADSL .delivers high (74) where you need it and only uses a single copper pair. Through multiplexing, it also reserves (75) of the bandwidth for POTS.

A．2 kHz

B．4 kHz

C．16 kHz

D．64kHz
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