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【单选题】
根桥发生故障后会重新选举其它交换机为新的根桥。那么原来的根桥恢复正常后又会如A.
网络拓扑保持不变
B.
只有当新根桥发生故障才重新选举
C.
一旦恢复正常就重新选举
D.
不重新选举，自动成为根桥
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皮皮学刷刷变学霸
举一反三
【单选题】为了把2-戊炔转变为顺-2-戊烯,应采用下列哪一个反应条件?
A.
BH3
B.
H2（一分子）Pd（Lindlar催化剂）
C.
H2（两分子）Pd（Lindlar催化剂）
D.
Na、液氨
【单选题】Lightning and thunder are related events. Lightning is a sudden, violent flash of electricity that occurs between a cloud and the ground or between two clouds in the sky. A lightning bolt can be sever...
A.
Compare and Contrast
B.
Spatial
C.
Chronological
D.
Problem and Solution
E.
Cause and Effect
F.
Order of Importance / Sequence
【单选题】Which of the following can be inferred from the passage about the digital approach to the processing of sound?
A.
It was developed in competition with wax-cyclinder recording technology.
B.
It has resulted in the first distortion-free playback system.
C.
It has been extensively applied to nonmusical sounds.
D.
It cannot yet process music originally recorded on analog equipment.
E.
It is not yet capalbe of reprocessing old recordings in a completely distortion-free manner.
【简答题】Different types of noise Some noises can be considered pleasant e.g. the sound of a 34 _____ in a town To investigate this, researchers may use methods from 35 _____ sciences e.g. questionnaire
【简答题】B1U3 Exercise 6 Banked close ___________ ___________ ___________ ___________ ___________ ___________ ___________ ___________ ___________ ___________
【简答题】Different types of noise Some noises can be considered pleasant e.g. the sound of a 34 in a town
【单选题】The sound /e/ can be described with “________, semi-close, unrounded.”
A.
front
B.
central
C.
lax
D.
back
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