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【判断题】
提高朗肯循环热效率的基本途径的依据是 卡诺循环热效率A.
正确
B.
错误
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反馈参考答案：
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。
【单选题】He tried very hard to______the authorities of his capabilities and loyalty, only to find that the more he tried, the less they believed him.
A.
tell
B.
show
C.
convince
D.
encourage
【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.
【简答题】According to Mrs. Bruce ,she __1___ (did/did not)approve of suffragettes. She felt highly __2___ if anybody called her a suffragette. She admited that the suffragettes tried very hard and ually ...
【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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