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【简答题】
世纪，被称为流行的世纪，轮回与重现成为流行的主旋律
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举一反三
【单选题】_____ hard they tried, they didn ’ t complete the task within a week.
A.
Whenever
B.
Whatever
C.
Whoever
D.
However
【简答题】使用电子分析天平进行称量时严禁将试剂撒漏在天平中,如有,应先用 清除残留试剂,再用棉球或纸蘸取适量 擦拭干净。
【简答题】A.They tried hard to repair the elevator. B.They released the details of the accident. C.They sent supplies to keep the miners warm. D.They provided the miners with food and water.
【单选题】Having tried hard several times, they finally _______ the hope of finding an effective way to save the dying man.
A.
abandoned
B.
released
C.
discouraged
D.
resigned
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