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简答题(共3小题;每小题1.5分,满分4.5分) Tsunamis (海啸) are a series of huge waves created by an underground movement such as an earthquake or a volcanic eruption (火山喷发) . A tsunami can travel hundreds of miles per hour in the open ocean and hit the land with huge waves. From the area where the tsunamis come, waves travel in all directions. Once the waves approach the coast, the y will become more than 100 feet in height. The topography (地形) of the coastline and the ocean floor will influence the size of the wave. There may be more than one wave and the latter one may be larger than the one before. That is why a small tsunami at one beach can be a huge wave a few miles away. All tsunamis are dangerous, even if they may not damage every coastline they strike. A tsunami can strike anywhere along most of the US coastline. Many harmful tsunamis have occurred along the coasts of California, Oregon, Washington, Alaska and Hawaii. A movement of the ocean floor, caused by earthquakes, most often causes tsunamis. If a tsunami occurs close to a coast, the first wave could reach the beach in a few minutes, even before a warning is given. Areas are at greater risk if they are less than 25 feet above sea level and within a mile of the coastline. Drowning is the most common cause of death during a tsunami. Tsunami waves are very harmful to buildings. Other dangers include floods, pollution of drinking water, and fires from gas lines. An accurate prediction (预报) system will allow authorities (官方) to issue timely warnings and save lives in the event of a shore-bound tsunami. But forecasting tsunamis accurately is very difficult because the ocean is usually calm before they strike land. 65. What can cause tsunamis according to the passage? ( 回答词数不超过6个 ) 66. What harm can a tsunami bring besides killing people and damaging buildings? ( 回答词数不超过15个 ) 67. Why is it very difficult to forecast tsunami accurately ? ( 回答词数不超过9个 )
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【判断题】这个是反相比例放大器的电路图。
A.
正确
B.
错误
【单选题】下列关于胸壁透创的描述,正确的是?
A.
所有的胸壁透创创口都可感觉到有空气进入胸腔的气流。
B.
切创、刺创造成的胸壁透创通常创缘整齐清洁,而铁钩、树枝、木桩创伤创缘不整齐,极易感染。
C.
胸壁透创创口周围可能存在皮下气肿,触诊有鼓音。
D.
开放性气胸伤口小,皮肤肌肉交错、血凝块填塞致创道闭合,空气不再进入。
【判断题】当汇水面积上最远点的雨水流达集流点时,全面积产生汇流,雨水管道的设计流量最大。
A.
正确
B.
错误
【单选题】细菌性痢疾与阿米巴痢疾的主要区别是:
A.
大便颜色
B.
大便量
C.
大便中找到病原体
D.
大便次数
E.
隐血检查
【单选题】下列关于胸壁透创的描述,正确的是?
A.
血胸时,胸腔内大血管破裂,出血严重,贫血,结果会导致呼吸困难。
B.
胸下部听诊出现拍水音,可诊断为血胸。
C.
X线检查,胸膈三角区水平浓密阴影,可诊断为血胸。
D.
胸壁透创后,心律加快、呼吸浅表、频数,说明有感染,发生了脓胸或胸膜炎。
【单选题】单选题:关于心输出量的描述,错误的是( )。
A.
正常人安静时约每分钟5~6L
B.
剧烈体力活动时可达安静时的5~6倍
C.
心率越快,心输出量越大
D.
女性比同体重男性低10%
E.
贫血和怀孕时心输出量增加
【单选题】下列关于胸壁透创的描述,正确的是?
A.
血胸时,胸腔内大血管破裂,出血严重,贫血,结果会导致呼吸困难。
B.
胸下部听诊出现拍水音,可诊断为血胸。
C.
X线检查,胸膈三角区水平浓密阴影,可诊断为血胸。
D.
胸壁透创后,心律加快、呼吸浅表、频数,说明有感染,发生了脓胸或胸膜炎。
【单选题】一种DAC的实现电路如图所示,这实际上是一个( ),其输入信号是( )。 【图片】
A.
基于运算放大器的反相加权求和电路,
B.
基于运算放大器的反相比例电路,
C.
基于运算放大器的反相加权求和电路,
D.
基于运算放大器的反相比例电路,
【单选题】以下关于心输出量描述错误的选项是?
A.
一分钟内心室收缩所排出的血容量
B.
心输出量 = 心率(次数 / 每分钟) X 心缩排血量
C.
一分钟内心房收缩所排出的血容量
D.
心输出量 = 脉搏 (次数 / 每分钟) X 心缩排血量
【多选题】使用普通教具的注意事项
A.
不要让教具代替教师的主导作用。
B.
不要过于追求时尚,从而忽视实用效果。
C.
不要浪费教学资源。
D.
提供情景,配合教学。
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