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【简答题】
下图为行星边界层( PBL )在温带森林( Temperate Forest )地区和寒带森林( Boreal Forest )地区的不同高度,可以看出后者的 PBL 层高度较高,请问这是为什么? 已知信息: ( 1 ) PBL 层的高度和地表提供的感热密切相关,感热越大, PBL 层越高; ( 2 )假如没有植被覆盖,从裸土 - 大气的温差来看,温带地区地表放出的感热肯定大于寒带地区的地表; ( 3 )观测发现,温带森林所在地区的热量释放 1/3 通过感热, 2/3 通过潜热;寒带森林所在地区的热量释放 2/3 通过感热, 1/3 通过潜热。这可能与温带森林和寒带森林的树木叶片大小有关。 请结合以上内容来回答问题,注意:答案不能超过 100 字!!!
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【简答题】When the pressure gets low, the boiling-point becomes low.
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【单选题】下列不属于原癌基因激活方式的是
A.
基因突变
B.
基因扩增
C.
染色体易位
D.
获得启动子或增强子
E.
启动子甲基化
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【多选题】When the low-carbon steel specimen is stretched and compressed in the axial direction, which of the following options is correct? .
A.
proportional limit s are equal
B.
yield strengths are equal
C.
ultimate strengths are equal
D.
elastic moduli are equal
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【简答题】操作系统的基本特性是
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【判断题】与塑料大棚相比，塑料中棚节省建材，但作业不便
A.
正确
B.
错误
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【判断题】As a rule ,when the pressure of the reservoir is high,the rate of production is low; but when the pressure is low,the rate is high.
A.
正确
B.
错误
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【单选题】下列不属于原癌基因激活因素的是( )
A.
点突变
B.
基因扩增
C.
基因的易位
D.
启动子的插人
E.
整条染色体的缺失
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【简答题】Changes in the prices of goods can cause changes in production and consumption. Production increases when the prices are high. As the prices of goods go up, producers make more goods because they can ...
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【单选题】When the costs of supplies increase in an industry, the low-cost leader
A.
may continue competing with rivals on the basis of product features.
B.
will lose customers as a result of price increases.
C.
will be unable to absorb higher costs because cost-leaders operate on very narrow profit margins.
D.
may be the only firm able to pay the higher prices and continue to earn average or above- average returns.
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【单选题】In the Northern Hemisphere, when the low pressure center at your location is northerly, causing the wind is located to your ______.
A.
NNW
B.
WSW
C.
ESE
D.
SSW
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相关题目：
【简答题】When the pressure gets low, the boiling-point becomes low.
查看完整题目与答案
【单选题】下列不属于原癌基因激活方式的是
A.
基因突变
B.
基因扩增
C.
染色体易位
D.
获得启动子或增强子
E.
启动子甲基化
查看完整题目与答案
【多选题】When the low-carbon steel specimen is stretched and compressed in the axial direction, which of the following options is correct? .
A.
proportional limit s are equal
B.
yield strengths are equal
C.
ultimate strengths are equal
D.
elastic moduli are equal
查看完整题目与答案
【简答题】操作系统的基本特性是
查看完整题目与答案
【判断题】与塑料大棚相比，塑料中棚节省建材，但作业不便
A.
正确
B.
错误
查看完整题目与答案
【判断题】As a rule ,when the pressure of the reservoir is high,the rate of production is low; but when the pressure is low,the rate is high.
A.
正确
B.
错误
查看完整题目与答案
【单选题】下列不属于原癌基因激活因素的是( )
A.
点突变
B.
基因扩增
C.
基因的易位
D.
启动子的插人
E.
整条染色体的缺失
查看完整题目与答案
【简答题】Changes in the prices of goods can cause changes in production and consumption. Production increases when the prices are high. As the prices of goods go up, producers make more goods because they can ...
查看完整题目与答案
【单选题】When the costs of supplies increase in an industry, the low-cost leader
A.
may continue competing with rivals on the basis of product features.
B.
will lose customers as a result of price increases.
C.
will be unable to absorb higher costs because cost-leaders operate on very narrow profit margins.
D.
may be the only firm able to pay the higher prices and continue to earn average or above- average returns.
查看完整题目与答案
【单选题】In the Northern Hemisphere, when the low pressure center at your location is northerly, causing the wind is located to your ______.
A.
NNW
B.
WSW
C.
ESE
D.
SSW
查看完整题目与答案