近距离治疗中定义的高剂量率照射,剂量率(Gy/h)应为()
A. 1
B. 2
C. 5
D. 12
E. 15
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除()外,其余都必须申请商标注册,未经核准注册不得生产、销售。
A. 卷烟
B. 雪茄烟
C. 复烤烟叶
D. 有包装的烟丝
中央政府债券的还本付息的担保是()
A. 中央银行
B. 中央政府
C. 国家财政
D. 商业银行
A vessel restricted by its ability to manoeuver by the nature of its work or its deep draft is().
A. hampered vessel
B. giving way vessel
C. vessel not under control
D. disabled vessel