已知D是等腰△ABC底边BC上的一个点,DE⊥AB于E,DF⊥AC于F,当D点在

题型:解答题

问题:

已知D是等腰△ABC底边BC上的一个点,DE⊥AB于E,DF⊥AC于F,当D点在什么位置时,DE=DF,并加以证明.

考点:等腰三角形的性质,等腰三角形的判定
题型:解答题

阅读理解。

     Our school is on Guangming Street.  It's next to the People's Library. There is a big garden across

from our school. The pay phone is between our school and the post office. There are three buildings in

our school, the students' building the teachers' building and the library building.The teachers in our school

are very good.

     Our school yard is very beautiful. If' you come to our school from the airport, take a taxi and go along

the highway until you see a bridge.Go across the bridge and turn left. Then go straight along Bridge Street. Our school is on the right.

根据短文内容,判断正(T)误(F)。

( ) 1.Our school is between the post office and People's Library.

( )2. The big garden is on Guangming Street.

( )3. The pay phone is behind the post office.

( )4. If' you go straight along highway,you can get to our school.

( )5. The market is across from our school.

题型:解答题

据国务院发布的《特种设备安全监察条例》,下列设备中属于特种设备的是()

A.冲床

D.挖掘机

C.液化气罐

D.汽车

题型:解答题

驾驶机动车在夜间超车时怎样使用灯光?

A.变换远、近光灯

B.开启雾灯

C.开启远光灯

D.关闭前大灯

题型:解答题

患者女性,33岁。停经40天,左下腹撕裂样疼痛1小时,腹痛逐渐加重,并出现心悸,气促,畏寒。查体:Bp80/40mmHg,HR120次/分,满腹压痛、反跳痛,移动性浊音(+)。妇科检查:宫颈有举痛,子宫稍大、软、有漂浮感,双穹隆均有压痛,右侧明显,未扪及肿块。

对于该患者,最恰当的处理方法是 ()

A.输液

B.纠正休克后手术

C.输血

D.纠正休克的同时手术

E.中药活血化瘀

题型:解答题

机械组织,指在稳定情况下,环境对组织的要求有一定常规,组织工作有较稳定的方向,对面临的问题有既定的解决方式,工作程序周而复始,比较固定的一类组织。下列属于机械组织的一项是( )。

A.王华与李明一起去秋游,遇上另外几个游览者,大家为省钱,一起去买团体票

B.电视剧中的一家人

C.电视剧组的工作室及其成员

D.红军长征途中,年轻的与年弱的一起相伴前进,以免丢队

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