微机保护除了具备传统继电保护系统的优点外,其最大的特点就是快速性、灵敏性和高可靠性。

题型:判断题

问题:

微机保护除了具备传统继电保护系统的优点外,其最大的特点就是快速性、灵敏性和高可靠性。

考点:维修电工考试维修电工考试题库
题型:判断题

阅读下面短文, 把A---D四个句子填入文中空缺处, 使短文内容完整、正确,然后完成第70小题。( 每小题2分 ,共10分 )

More and more people around the world are joining in dangerous sports. Some people climbed the highest mountains, some traveled into unknown parts of the world, some sailed small boats across the largest sea.     小题1:   

Bungee jumping ( 蹦极 ) and motorcycle racing are quite dangerous sports. Bungee jumping only lasts a few minutes or even seconds. You jump from a high place , 200 meters above the ground , and there is a rubber band ( 带子 ) tied to your legs.  小题2:  

About 2,000,000 people around the world have tried bungee jumping.

Why do people join in these dangerous sports? Some scientists say that it is because modern life has become safe and it is not interesting.    小题3:    They had to go out and look for food, and life was like a fight but was interesting.

   小题4:    They live and work in safe places, buy food in shops, and there are doctors and hospitals to look after them if they become ill.

小题5:Which of the following is WRONG?

A.People like to join in dangerous sports because they need excitement.

B.Traveling into unknown parts of the world is not a dangerous sport.

C.In bungee jumping, you jump down with a rubber band tied to your legs.

D.In the past, people lived in danger because the living condition was poor.

题型:判断题

有班级表和学生表如下:
班级表

班级号 班级名称 班级人数
200301 03计算机一班 55
200302 03计算机二班 48
200303 03计算机三班 50
学生表
班级号 学号 姓名 性别 籍贯
200301 1001 王伟 北京
200301 1002 刘红 上海
200301 1003 李林 北京
200302 2001 张清 上海
200302 2002 刘雷 上海
有如下SQL语句:
SELECT 班级名称,姓名,性别 FROM 班级表,学生表;
WHERE 班级表.班级号=学生表.班级号;

AND 籍贯=“上海” AND 性别=“女”;
ORDER BY 班级名称 DESC
执行该语句后,查询结果中共有几条记录,且第一条记录的学生姓名是(
)。A) 1李林
B) 2张清
C) 2刘红
D) 3张清

题型:判断题

解方程,第3题要写出验算过程.

(1)1.56x+3.16=7.84

(2)3.6÷6+2x=0.8

(3)5.4(x-1.8)=2.7.

题型:判断题

下图是沈阳九一八博物馆最引人注目的“残历碑”。巨大石雕台历上密布着千疮百孔的弹痕,隐约可见无数个骷髅,象征着千万个不泯的冤魂的呐喊和呼号。右面的一页铭刻着中国人民永远难忘的最悲痛的日子——1931年9月18日。左面的一页镌刻着“九一八”事迹的史实。九一八事变后,中国抗日战争进入了

[ ]

A.局部抗战阶段

B.全面抗战阶段

C.局部反攻阶段

D.大反攻阶段

题型:判断题

使用止血带应注意()。

A.扎止血带时间越短越好 

B.必须作出显著标志,注明使用时间 

C.避免勒伤皮肤 

D.缚扎部位原则是尽量靠近伤口以减少缺血范围 

E.缚扎止血带要很紧

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