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【单选题】
punctualityA.
visual observation
B.
promptness
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反馈参考答案：
举一反三
【简答题】倒车雷达一般由( )、( )和( )等部分组成。
【简答题】根据光谱实验结果和对元素周期律的分析,绝大多数元素的原子,其原子核外电子排布应遵循()、()、()三个原则。
【单选题】When a man says 'I have five children', normally he means that he has five and only five children. This implicature is possible as a result of his following the maxim of ______.
A.
quality
B.
quantity
C.
manner
D.
relevance
【单选题】He could play the violin when he was five .
A.
at the age of five
B.
five years later
C.
for five years
D.
five years age
【简答题】倒车雷达由 、 和 等部分组成。
【简答题】y=sin(x),x从0到2p,Dx=0.02p,求y的最大值、最小值、均值和标准差。(应用max,min,mean,std)
【单选题】Although he is only a __________ boy, he knows a lot.
A.
five-year old
B.
five-year-old
C.
five years old
D.
five-years-old
【简答题】倒车雷达由( ),( ),( )等部分组成。
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