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1.brittle adj. 易碎的,脆弱的
[举一反三]  同
breakable, fragile
[双语语境] Sometimes, the life of human being is as brittle as thin glass. 有的时候人的生命如玻璃一样容易破碎.
[串联记忆] The two boys quarreled so much that their friendship became rather brittle.
A. elastic   B.strong   C. fragile   D. sturdy
 
2.bucket n.水桶,吊桶
[举一反三]  派
bucketful   n. 一桶,一满桶

[串联记忆] The two sisters went up the hill and fetched a bucket of water.
A.cup     B.basin   C.pail   D.bag

3.bulk n.1.体积,容积||2.主体,大批,大量,大块
[双语语境]It’s not their weight that makes these sacks hard to carry, it’s their bulk.这些袋子难以搬运,倒不是因为重而是体积大.|| The bulk of the work has already been done. 大部分工作已经完成.
4.bulletin n. 公报,公告,告示
[串联记忆]Here is the latest bulletin about the president’s health.
A. conference B.report C film D.reel

5.bureau n. 署,局,司,处
[举一反三] 同
branch, department, office ,section,service
[双语语境]Federal Bureau of Investigation. 联邦调查局
[串联记忆]The weather_________ makes daily reports on weather conditions.
A. apartment    B.bureau    C. bullet    D. jail