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【单选题】
下图右侧小红框区域的工具是?A.
移动工具
B.
裁剪工具
C.
矩形选框工具
D.
矩形工具
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反馈参考答案：
举一反三
【多选题】下列关于相位、初相和相位差的说法正确的是:
A.
正弦交流电t=0时对应的相位就是它的初相位
B.
两正弦交流电相位差的绝对值可以超过180度
C.
同频率正弦交流电的相位差才有意义
D.
同频率正弦交流电的相位差不随时间的变化而变化
【简答题】请选出问句的合适答语 ( ) 1. Where are you from? ( ) 2. What's this? ( ) 3. Is the Queen's house big? A. I'm from China. B. It's a pen. C. Yes, it is．
【简答题】The Queen’s English is now sounding less upper-class, a scientific study of the Queen’s Christmas broadcasts had found. Researchers have studied each of her messages to the Commonwealth countries sinc...
【简答题】The Queen’s English is now sounding less upper-class, a scientific study of the Queen’s Christmas broadcasts has found. Researchers have studied each of her messages to the Commonwealth countries sinc...
【单选题】关于相位差的说法不正确的是( )。
A.
相位差是同频率正弦量的相位角之差
B.
相位差是同频率正弦量的初相角之差
C.
两个同频率的正弦量之间的相位差为常数，与计时的选择起点有关
D.
同频率的正弦量之间计算相位差时，其超前和滞后的角度不能大于 180 °
【单选题】What does the writer think of the interior and exterior of Queen Anne's Mansions?
A.
They were elegantly decorated both inside and outside.
B.
They were grim from the outside and had a modest decor inside.
C.
They were flashy from the street but nondescript. inside.
D.
They were plain outside but with lavish interiors.
【简答题】Please yze briefly Edmund Spenser s The Faerie Queen. What do those knights and the evil figures symbolize respectively? What kind of ideas does the author want to express under the guise of medie...
【单选题】What's the topic about the Queen's broadcast?
A.
On War
B.
On Coronavirus
C.
On her family
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