| 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. distances B. gaps C. intervals D. length [单项选择]带锯机锯条裂纹超过锯条宽度的（）不能使用。
A. 1/2 B. 1/4 C. 1/6 D. 1/8 [单项选择]“教师表”中有“职工号”、“姓名”、“工龄”和“系号”等字段，“学院表”中有“系名”和“系号”等字段，计算“计算机”系教师总数的命令是（）。
A. SELECT COUNT(*)FROM 教师表 INNER JOIN 学院表; ON 教师表.系号=学院表.系号 WHERE 系名="计算机" B. SELECT COUNT(*)FROM 教师表 INNER JOIN 学院表; ON 教师表.系号=学院表.系号 ORDER BY 教师表.系号; HAVING 学院表.系名="计算机" C. SELECT SUM(*)FROM 教师表 INNER JOIN 学院表; ON 教师表.系号=学院表.系号 GROUP BY 教师表.系号; HAVING 学院表.系名="计算机" D. SELECT SUM(*)FROM 教师表 INNER JOIN 学院表; ON 教师表.系号=学院表.系号 ORDER BY 教师表.系号; HAVING 学院表.系名="计算机" [单选题]搭设脚手架时,搭建的( )必须要得到保证.
A.横杆 B.立杆 C.外墙 [判断题]感度试验是自阀减压50kPa（编组60辆及以上时为70kPa）并保压1min，全列车必须发生制动作用，并不得发生自然缓解，司机检查制动主管漏泄量，每分钟不得超过20kPa；手柄移至运转位后，全列车须在1min内缓解完毕。
A.正确 B.错误 [简答题]
刘某是B软件公司的员工，公司按照规定给每位员工都缴纳了医疗保险。2003年11月，刘某突然感觉难受并去定点医院就诊，经诊断为胃炎，刘某住院治疗花费1300元，病愈后，刘某找单位人事部报销。但人事部负责人认为，当地的医疗费起付线为2000元，刘某的花费未达同意标准，不能报销。 [单选题]轿厢下梁碰板至弹簧缓冲器距离为（ ）
A.150-400 B.200-400 C.200-350 D.150-350 [判断题]道岔杆件的开口销可以单边使用
A.正确 B.错误 [单项选择]
Questions 29 and 30 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now, listen to the news. Where is the presence of security patrols most evident（）A. Where matches take place B. Where protests may take place. C. In downtown Vancouver D. Around the athletes’ village. [单选题]在实际工作中，事实上不存在纯粹的（ ）。
A.职能型组织结构 B.直线一职能参谋型组织结构 C.赢线型组织结构 D.事业部型组织结构 [单项选择]Most of the students felt rather disappointed at the English party. They say that it ______ better organized.
A. had been B. had to be C. must have been D. could have been [单项选择]下列哪项症状在门静脉高压症时不出现
A. 下肢静脉曲张 B. 脐周静脉曲张 C. 胃粘膜出血 D. 血小板减少 E. 脾肿大 [判断题]为保证人身安全，除专业人员按规定作业外，任何人员所携带的物件 (包括长杆、导线等)与接触网设备的带电部分需保持2m以上的距离。
A.正确 B.错误 [单选题]属于非细胞型微生物的是
A.细菌 B.放线菌 C.衣原体 D.真菌 E.病毒 [单选题]在土质松软处挖坑，不应由（ ）掏挖土层。
A.由上至下 B.上部 C.下部 D.由左至右 我来回答: 提交
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