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林中放烟剂，要求林间产生“气温差逆增”现象出现和风速...
林中放烟剂，要求林间产生“气温差逆增”现象出现和风速稳定在0.3~1m·s-1 。因此林中放烟时间最好在
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A、journey time savings
B、expensive to build
C、disruption during construction
D、noise
更多“林中放烟剂，要求林间产生“气温差逆增”现象出现和风速...”相关的问题
第1题
（多选）Big transportation infrastructure projects (e.g. high-speed railways) bring wider economic benefits to an area. Which of the following are NOT economic benefits?
第10题
(多选) Why do we need pauses in our speeches?
A、We need pauses to punctuate our speech.
B、We need pauses so that listeners have time to take in the information.
C、We need pauses to control the flow of speech.
D、We need pauses to emphasize some points.
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