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【单选题】
下图为45°N附近某区域的遥感影像，其中深色部分为植被覆盖区，浅色部分为高原荒漠区；终年冰雪覆盖的山峰海拔3424米，距海约180千米。读下图，完成下列各题。 导致图示区域内降水差异的主导因素是（）A.
大气环流
B.
地形
C.
纬度位置
D.
洋流
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【单选题】In Australia’s New South Wales, a group of animals are at risk of losing their home with a new l
A.
28. In Australia’s New South Wales, a group of animals are at risk of losing their home with a new logging program soon ______. A．starts
B.
to start
C.
starting
D.
Started
【简答题】二氧化碳气体保护焊能量集中,引弧容易,连续( )电弧不中断。
【简答题】An ecosystem is a group of animals and plants living in a specific region and interacting with one another and with their physical environment．Ecosystems include physical and chemical components，such ...
【单选题】Naturally, m a group of animals as diverse as the snakes, and with so many varied enemies. there are numerous defensive reactions and devices. There is. however, one general pattern of behavior. In th...
A.
avoiding any observation
B.
Finding a safe shelter
C.
giving a warning threat
D.
starting a quick attack
【单选题】Naturally, in a group of animals as diverse as the snakes, and with so many varied enemies, there are numerous defensive reactions and devices. There is, however, one general pattern of hehaviour, in ...
A.
when in doubt, it will attack
B.
it will usually do its best to avoid trouble
C.
attack is its chief form. of defence
D.
it is completely unpredictable
【单选题】Naturally, in a group of animals as diverse as the snakes, and with so many varied enemies, there are numerous defensive reactions and devices. There is, however, one general pattern of behavior. In t...
A.
avoiding any observation.
B.
finding a safe shelter.
C.
giving a warning threat.
D.
starting a quick attack.
【单选题】In the original testㄛall the animals in a test group are given a substance _______ half of them die.
A.
unless
B.
until
C.
lest
D.
provided
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