下列法律文件是法国大革命时期颁布的是[ ]
A.《汉谟拉比法典》
B.《 * * 宣言》
C.《权利法案》
D.《1787 年宪法》
答案:B
How is a safe water mark,that can be passed close aboard on either side,painted and lighted?()
A.Black and white stripes with an interrupted quick flashing light
B.Black and red stripes with a Morse (A) light
C.Black and red stripes with an interrupted quick flashing light
D.Red and white stripes with a Morse (A) light
进入受限空间作业,应有足够的照明。在金属设备内和特别潮湿作业场所作业,其安全灯电压应为多少伏且绝缘良好?