升空烟花燃放试验场距离居民住宅最小()m。 A.50 B.30 C.100 D.20

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问题:

升空烟花燃放试验场距离居民住宅最小()m。

A.50

B.30

C.100

D.200

考点:操作工技能考核考试日用杂品日用杂品题库
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一位20多岁的女青年因丧失兴趣,对以往爱好缺乏快感,情绪低下,早醒,昼重夜轻,对自己的身体健康过分关心而来到心理门诊求医

如果需给她作临床评定,应考虑选用的量表是()

A.大体退化量表

B.MMPI

C.Hamilton焦虑量表

D.Hamilton抑郁量表

E.H.R神经心理成套测验

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以下三题基于"学生-选课-课程"数据库中如下三个关系:S(S#,SNAME,SEX,AGE) SC(S#,C#,GRADE) C(C#,CNAME,TEACHER)

查找学生号为"200301188"的学生的"数据库"课程的成绩,至少将使用关系

A.S和SC

B.SC和C

C.S和C

D.S、SC和C

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C

Statistically, air travel is by far the safest way to travel, and you can make flying even safer, just by following these simple rules.As your chances of being involved in an air accident are practically nil(零), many of these tips concern what you should and shouldn’t do to make your journey safer when you are airborne(升空的).

Fly on non-stop routes

Most accidents occur during the takeoff, climb, descent and landing phases of a flight, so flying non-stop reduces your exposure to these complex procedures.

Choose larger aircraft.

Although small aircraft have very good safety records, those with more than 30 passenger seats are designed to comply(遵守)with much stricter regulations and are tested more regularly to make sure they still comply. Also, in the unlikely event of a serious accident, larger aircraft provide a better opportunity for passenger survival.

Pay attention to the pre-flight safety briefing

The information may seem repetitious(重复的), but it’s worth listening to the flight attendants.And even if you’ve flown before, it doesn’t mean you know everything about the aircraft you’re on, such as the location of the closest emergency exit.

Store things safely

Never put very heavy articles in the overhead storage bins. They may fall out when someone opens the bin and cause injury. Also, the bin may not be able to hold heavier objects during turbulence(气流).

Keep our seat belt fastened while you are seated

Cabin crew always tell you this, but it’s important. You would be seriously injured if the plane hits unexpected turbulence. Always fasten your seat belt if you are told to.The general rule of flying is this: If you are told to do something, do it first and ask questions later.

Let the flight attendant pour your hot drinks

Flight attendants are trained to handle hot drinks like coffee or tea in a crowded aisle on a moving aircraft, so allow them to pour the drink and hand it to you. Never ask to take a coffee pot from one of them.

66. What is the overall reason for these air safety tips?

A. What to do in the event of a crash.                     B. How to avoid turbulence.

C. How to improve safety while you are flying. D. How to avoid injury.

67. What is NOT the reason that you should choose larger aircrafts?

A. They are more comfortable.                   B. They have stricter regulations.

C. They are tested more often.                       D. There are more possibilities of surviving.   

68. The underlined phrase “The general rule” in the fifth tip refers to ____.

A. anything the flight staff tell you to do    B. general safety advice

C. walking around the plane                     D. pouring hot drinks

69. Which of the following is NOT true?

A. You are not supposed to ask for a coffee pot.

B. Take-offs is safer on non-stop flights than landings.

C. Every aircraft is different, so the safety procedures may be different.

D. Seat belts should be worn to protect against turbulence.

70. The best title of the passage should be____.

A. The Safest Way to Travel                           B. Air Safety Tips

C. Non-stop Routes                                        D. How to Ply a Plane

题型:单项选择题

目前骨质疏松症早期诊断最方便、最确切的方法是()

A.普通X线摄片法

B.单能或双能的骨密度测定仪

C.定量CT

D.骨活检

E.血骨钙素

题型:单项选择题

关于氟牙症的描述不正确的是

A.受害区柱间发育不全或完全消失
B.透射电镜下观察与正常釉质不同
C.氟牙症者少发生龋
D.光镜观察釉基质有缺陷
E.严重者釉质有缺损且有色素沉着

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