在能见度不良的水域中航行,下列哪些船舶应将航速减到能维持其航向的最小速度?()
Ⅰ、与正横前的来船不能避免碰撞危险时;
Ⅱ、听到正横前来船的雾号,但尚未确定是否存在碰撞危险时;
Ⅲ、雷达上发现与正横前的来船不能避免紧迫局面时;
Ⅳ、当与正横前的来船不能避免紧迫危险时
Man cannot go on increasing his number
at the present rate. In the (56) 30 years man will face a
period of crisis. (57) experts believe that there will be a
widespread food (58) . Other experts think this is
(59) pessimistic (悲观的), and that man can prevent things from
(60) . (61) thing that man can do is to limit the (62) of babies born. The need (63) this is obvious, but it is not (64) to achieve. People have to be (65) to limit their families. In the countries of the population (66) , many people like big families. The parents think that this (67) a bigger income for the family and ensures there will be someone in the family who will look (68) them in old age. Several governments have (69) birth control policies in recent years. (70) A. so B. much C. too D. enough [多项选择]β受体阻滞剂与下列哪些药物合用时应减少用量()
A. 四环素 B. 西米替丁 C. 苯巴比妥钠 D. 利福平 E. 氯丙嗪 [单项选择]
Conversation 1 A. Wife and husband. B. Salesman and customer. C. Teacher and student. D. Employer and employee. [单选题]急性胆囊炎的疼痛是
A.阵发性绞痛 B.持续性疼痛 C.持续性疼痛阵发性加剧 D.持续闷胀痛 E.钻顶样绞痛 [单项选择]患者,女,28岁,已婚,月经周期正常,经期6天,近半年来,每月于月经后7天左右见阴道少量出血,色红,质黏腻,持续2~4天自止伴胸闷烦躁,神疲乏力,食欲不佳,舌苔白腻,脉滑此病最常用方剂为()
A. 两地汤合二至丸 B. 逐瘀止血汤 C. 清肝止淋加减 D. 人参养荣汤 E. 丹栀逍遥散 [判断题] ( )当硫化氢在空气中的浓度小于10毫克/立方米时,其臭味的增强与浓度的升高成反比,但当浓度超过10千克/立方米之后,浓度继续升高其臭味反而减弱。
A.正确 B.错误 [单选题]头面部、颈部、会阴部烧伤、创面处理宜采用
A.冷敷 B.包扎疗法 C.暴露疗法 D.浸泡疗法 E.药物湿敷 [判断题]液压系统中使用的油液,其粘度随温度的变化越小越好。
A.正确 B.错误 [单选题] 依据《安全生产许可证条例》的规定,民用爆炸物品生产企业安全生产许可证的颁发机关是国务院安全生产监督管理部门。()
A.正确 B.错误 [简答题]烧鸡加工中如何避免出现质量问题?
[判断题]军用列车等级高于特快货物班列。( )(应知应会-《技规》第233条)
A.正确 B.错误 [判断题]世界农作物生产以粮食为首要,就播种面积来说,水稻居第一位。
[填空题]特种设备使用部门,( )必须对在用特种设备进行( )日常维护保养和常规安全检查。
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