题目内容

焊接场地应保持必要的通道,车辆通道宽度不小于5m。()

A. 对
B. 错

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以下对射线检测的特点,描述错误的是( )。

A. 可以获得缺陷直观图像,定性准确
B. 对体积犁缺陷(气孔、夹渣类)检出率高,对面积性缺陷(裂纹、未熔合类)容易漏检
C. 适宜检验厚度较厚的工件,不适宜检验较薄的工件
D. 适宜检验对接焊缝,不适宜检验角焊缝以及板材、棒材和锻件等

下列哪个是Java类分解器,即对.class文件提供字节代码的反汇编,并打印

A. java.exe
B. jdb.exe
C. javap.exe
D. javac.exe

Applet的默认布局管理器是FlowLayout,而Swing Applet的内容面板的默认布局管理器是

A. FlowLayout
B. CardLayout
C. BorderLayout
D. GridLayout

Why is more earth's heat blocked from escaping with more carbon dioxide in the atmosphere

A. Carbon dioxide prevents the sun's energy from going back into space.
B. Carbon dioxide radiates the sun's energy onto the earth.
Carbon dioxide produces more heat in the atmosphere.
D. Carbon dioxide takes in the sun's energy at infra-red wavelengths.

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