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【单选题】
屋面双坡,两侧伸出山墙之外,屋面上有一条正脊和四条垂脊,这种形式的屋顶称为( )。A.
庑殿顶
B.
悬山顶
C.
硬山顶
D.
歇山顶
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举一反三
【单选题】……………………… Firstly, security threats (such as 9/11) and economic downturns (e.g. the 2008 global economic crisis) have an impact on numbers of air passengers, although these have always been followed b...
A.
Several recent events have caused a temporary dip in air travel.
B.
There are several issues that might slow down or even reverse this growth.
C.
There are a number of negative impacts of air travel, such as air pollution.
D.
【简答题】Speech sounds of all languages are broadly classified into vowels and c____ , and the difference between them is whether there is an o____ of air stream in producing a sound.
【简答题】When air is in rapid motion , there is a decrease of pressure as the speed of the air increases and an increase of pressure as the speed of the air decreases.
【简答题】When air is in rapid motion,there is a decrease of pressure as the speed of the air increases and an increase of pressure as the speed of the air decreases.
【简答题】有泉城之称的城市是( )
【单选题】The sounds in the production of which there is an obstruction of the air-stream at Some point the vocal tract are called
A.
consonance
B.
consonant cluster
C.
consistency
D.
consonants
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