对无人值班的变（配）电所，电力电缆线路每周至少进行一次巡视。
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按机器人的应用分类，可分为（）、极限作业机器人和娱乐机器人。
An International Tonnage Certificate will be issued to a vessel when it meets several requirements，one of which is that the vessel must （）.
A. admeasure over 100 GT
B. be 79 or more feet in length
C. engage in intercoastal or international trade
D. be issued a Certificate of Inspectio
哪种肿瘤相对较少骨转移（）
A. 甲状腺癌
B. 乳腺癌
C. 肺癌
D. 脑肿瘤
E. 肝癌
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