| The safety of ships at sea does not
depend only on the arrangements made in the ships themselves. Dangerous coasts
and rocks may be seen in the daytime, (51) they are a threat
to safe navigation at night. Lighthouses are therefore erected at such places
to (52) sailors of the danger. Modern lighthouses are put up
at all dangerous places near the courses (53) by ships. On
some rocky coasts several lighthouses may be built not far from each other,
and (54) the sailors on a ship may know which is which, they
have (55) arrangements of lights. One lighthouse will
give a single flash at regular (56) , another may give two
flashes; a third may give two followed by one; and so on. (57)
watching the lights the navigator is able to decide exactly where he
is, and he can set his (58) with confidence. In A. another B. other C. the other D. one [单选题]厚朴、广藿香共有的药理作用是
A.促进消化液分化 B.保肝 C.抗肿瘤 D.促进骨骼钙化 E.抗溃疡 [多选题]绝缘杆作业法中控制绝缘操作杆有效绝缘长度的措施有( )。
A.工作负责人(专责监护人)监护 B.作业位置合适 C.绝缘杆手持部分标注明显 D.登杆作业人员之间互相提醒 [多项选择]按期权所赋予的权利的不同可将期权分为______。
A. 看涨期权 B. 看跌期权 C. 欧式期权 D. 美式期权 [简答题]QC小组活动选题依据是什么？
[单项选择]下列具有免疫双向调节作用的清热药是（）
A. 人参 B. 甘草 C. 桂枝 D. 黄芩 E. 桔梗 [单项选择]饭店优质服务的职业道德要求我们，当个人利益与国家、企业集体利益发生冲突时，要牺牲（）利益。
A. 国家 B. 集体 C. 企业 D. 个人 [单项选择]2岁患儿心跳呼吸骤停，经气管插管、人工呼吸及胸外心脏按压后无改善，尚未建立静脉通道，此时应选择（）
A. 静脉内给药 B. 气管内给药 C. 骨髓腔给药 D. 肌内注射 E. 心内给药 我来回答: 提交
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