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【简答题】
一架钢琴的“中音 C ”有些不准,为了校准的需要,另取一架标准的钢琴,同时弹响这两架钢琴的“中音 C ”键,在 1 分钟内听到 24 拍, 已知标准钢琴 “中音 C ” 的频率为256Hz ,则 待校正钢琴“中音 C ”的频率为 Hz. (结果保留一位小数)。
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参考答案:
举一反三
【单选题】在电动汽油泵中,用于维持保持压力的装置是( )
A.
安全阀
B.
单向阀
C.
燃油压力调节器
【简答题】Diogenes developed a reputation through his philosophy of practice. He lived in great poverty, and rejected all forms of luxury. For example, he discarded eating utensils, drank from his hands, and li...
【判断题】假象是以虚假的、歪曲的、否定的形式反映事物本质的现象。( )
A.
正确
B.
错误
【单选题】学前儿童日常体育活动的形式和方法有很多,一般以( )为主,重点是发展学前儿童的基本动作能力
A.
自由活动
B.
学前儿童体操
C.
体育课
D.
体育游戏活动
【判断题】发动机启动时和启动后对于喷油量的控制模式完全相同。
A.
正确
B.
错误
【单选题】Physicians who tend to emphasize the patient's autonomy in medical decision-making may have a harder time with patients who ___________ responsibility for their health or are comfortable in a more vul...
A.
take
B.
bear
C.
abdicate
D.
show
【简答题】与胶片摄影机相比,数字摄影机的原理有何不同?
【单选题】The biggest difference between Diogenes and hermits is that _________.
A.
Diogenes lived simply
B.
Diogenes grew tired of human society with its complications
C.
Diogenes had a sense of mission
D.
Diogenes lived like a dog
【简答题】We now have great pleasure in sending you a copy of our latest illustrated catalog and comprehensivepricelist.
【单选题】Diogenes lived like a dog in order to ________.
A.
teach a simple and natural way of life by his own example
B.
show his sympathy to the poor
C.
show that he couldn't afford a decent life
D.
display a kind of doglike lifestyle
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