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【判断题】
单元体两个相互垂直的截面上的正应力之和为一定值 。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】听力原文： Our environment is being polluted faster than the nature and man's present efforts can prevent it. Time is bringing us more people, and more people will bring us more industry, more motor vehicl...
A.
It's because there are many developing nations.
B.
Ws bemuse people use too many man-made materials.
C.
It's because we have more and more industry.
D.
It's because we are building more vehicles.
【多选题】在启用简单按钮功能关闭的情况下,要对某个按钮进行编辑,可以执行以下哪些操作?
A.
双击舞台上的按钮元件实例
B.
鼠标右键单击按钮元件实例，从弹出的菜单中选择“在当前位置编辑”
C.
鼠标左键单击选中按钮元件实例，执行“编辑→编辑所选项目”
D.
鼠标右键单击按钮元件实例，从弹出的菜单中选择“编辑”
【单选题】听力原文： Our environment is being polluted faster than the nature and man's present efforts can prevent it. Time is bringing us more people, and more people will bring us more industry, more motor vehicl...
A.
It's because there are many developing nations.
B.
It's because people use too many man-made materials.
C.
It's because we have more and more industry.
D.
It's because we are building more vehicles.
【单选题】听力原文： Our environment is being polluted faster than the nature and man's present efforts can prevent it. Time is bringing us more people, and more people will bring us more industry, more motor vehicl...
A.
It's because there are many developing nations.
B.
It's because people use too many man-made materials.
C.
It's because we have more and more industry.
D.
It's because we are building more vehicles.
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