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【判断题】
灭火器的检查周期是二年。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
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【简答题】从理论上讲,闭合水准路线各测段高差代数和应等于( )。
【单选题】哪个选项对turtle.done()的描述是正确的?
A.
turtle.done()用来隐藏turtle绘制画笔,一般放在代码最后
B.
turtle.done()放在代码最后,是turtle绘图的必要要求,表示绘制完成
C.
turtle.done()用来暂停画笔绘制,用户响应后还可以继续绘制
D.
turtle.done()用来停止画笔绘制,但绘图窗体不关闭
【单选题】According to the announcement, which of the following is tree of special summer hours for the library?
A.
It has them only on the weekends.
B.
It has them both weekdays and weekends.
C.
It has no special summer hours.
D.
This information is not available.
【单选题】哪个选项对turtle.done()的描述是正确的?
A.
turtle.done()放在代码最后，是turtle绘图的必要要求，表示绘制完成
B.
turtle.done()用来隐藏turtle绘制画笔，一般放在代码最后
C.
turtle.done()用来停止画笔绘制，但绘图窗体不关闭
D.
turtle.done()用来暂停画笔绘制，用户响应后还可以继续绘制
【单选题】According to the announcement which of the following is tree of special summer hours for the library?
A.
It has them only on the weekends.
B.
It has them both weekdays and weekends.
C.
It has no special summer hours.
D.
The information is not available.
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