【填空题】
8、涡度是衡量空气质块旋转运动强度的物理量,逆时针旋转时为___涡度,顺时针旋转时为___涡度。
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16、随着技术的发展,天气预报也从基于传统的天气理论、数理统计与预报员经验的半经验半理论的定性方法阶段,发展到以___为基础,以___为平台,综合应用多种科学技术最新成果和方法的新时代。
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【填空题】
13、强对流天气和暴雨天气的比较:大气层结。暴雨发生在深厚的暖湿气团中,而强对流发生在强的___中,其潜在不稳定能量区要比暴雨___。风的垂直结构。暴雨过程的低层多为东北或偏东风,高层为___;强对流天气低层为___,中高层为西北风。
【填空题】
16、我国境内有两个主要的锋生区通常称为南方锋生带和北方锋生带,南方锋生带是指华南到长江流域的锋生区;北方锋生带是指___到东北的锋生区。它们是和南北两支高空___相对应的。
【填空题】
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【单选题】
Read this pasaage and answer the five questions
That people often experience trouble sleeping in a different bed in unfamiliar surroundings is a phenomenon known as the “first-night” effect. If a person stays in the same room the following night they tend to sleep more soundly. Yuka Sasaki and her colleagues at Brown University set out to investigate the origins of this effect.
Dr. Sasaki knew the first-night effect probably has something to do with how humans evolved. The puzzle was what benefit would be gained from it when performance might be affected the following day. She also knew from previous work conducted on birds and dolphins that these animals put half of their brains to sleep at a time so that they can rest while remaining alert enough to avoid predators (捕食者). This led her to wonder if people might be doing the same thing. To take a closer look, her team studied 35 healthy people as they slept in the unfamiliar environment of the university’s Department of Psychological Sciences. The participants each slept in the department for two nights and were carefully monitored with techniques that looked at the activity of their brains. Dr. Sasaki found, as expected, the participants slept less well on their first night than they did on their second, taking more than twice as long to fall asleep and sleeping less overall. During deep sleep, the participants’ brains behaved in a similar manner seen in birds and dolphins. On the first night only, the left hemispheres (半球) of their brains did not sleep nearly as deeply as their right hemispheres did.
Curious if the left hemispheres were indeed remaining awake to process information detected in the surrounding environment, Dr. Sasaki re-ran the experiment while presenting the sleeping participants with a mix of regularly timed beeps (蜂鸣声) of the same tone and irregular beeps of a different tone during the night. She worked out that, if the left hemisphere was staying alert to keep guard in a strange environment, then it would react to the irregular beeps by stirring people from sleep and would ignore the regularly timed ones. This is precisely what she found.
Question1:
What did researchers find puzzling about the first-night effect?
A. What role it has played in evolution.
B. To what extent it can trouble people.
C. What circumstances may trigger it.
D. In what way it can be beneficial. .
【单选题】
Question2:
What do we learn about Dr. Yuka Sasaki doing her research?
A. She found birds and dolphins remain alert while asleep.
B. She found birds and dolphins sleep in much the same way.
C. She got some idea from previous studies on birds and dolphins.
D. She conducted studies on birds’ and dolphins’ sleeping patterns.
【单选题】
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