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【简答题】
“隔墙有耳”说的是室内人的说话声能被室外的人听到。如图所示，室外人听到声音的传播途径是：室内人的说话声引起室内____振动，导致 振动，从而引起室外的 振动，所以室外的人可以听到声音。
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【单选题】Employees who spend at least some (but not all) of their time working remotely have higher engagement than those who don't ever work remotely.
A.
She has broken off her engagement to Charles.
B.
He was known for his engagement with the problems of the most difficult students.
C.
The governor has numerous speaking engagements .
【单选题】(单选)颗粒在流体中做沉降运动时,阻力系数:
A.
仅与颗粒雷诺数有关
B.
仅与颗粒球形系数有关
C.
与颗粒雷诺数和球形系数都有关
D.
与颗粒雷诺数和球形系数都无关
【单选题】engagement Employees who spend at least some (but not all) of their time working remotely have higher engagement than those who don't ever work remotely.
A.
She has broken off her engagement to Charles.
B.
He was known for his engagement with the problems of the most difficult students.
C.
The governor has numerous speaking engagements .
【单选题】According to WTO's definitions, international tourists are visitors who spend at least _____ night(s) in accommodation in the destination country.
A.
one
B.
two
C.
three
D.
four
【单选题】哪个选项里的engagement和原句里是一样的意思? Employees who spend at least some (but not all) of their time working remotely have higher engagement than those who don't ever work remotely.
A.
She has broken off her engagement to Charles.
B.
He was known for his engagement with the problems of the most difficult students.
C.
The governor has numerous speaking engagements .
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