下列比例尺最大的是: A.1/500000 B.1:600000 C.四百万分之

题型:选择题

问题:

下列比例尺最大的是:

A.1/500000

B.1:600000

C.四百万分之一

D.1/5000000

考点:地图的基本知识地形图判读地图的应用
题型:选择题

某管道安装工程项目。该管道工程属于超高层建筑管道工程,由于施工项目经理部严格执行超高层建筑管道施工的技术要点,使得工程进展非常顺利,施工质量达到各项要求。管道安装完毕后,对其进行了系统试验,试验时的有关实施过程如下:

(1) 采用闪点为40℃的可燃液体介质对管道进行液压试验;

(2) 在进行液压试验时其环境温度为2℃;

(3) 在进行气压试验时,承受内压钢管的试验压力为设计压力的2.15倍;

(4) 泄漏性试验合格后进行真空度试验。

管道泄漏性试验应重点检验的项目有哪些?

题型:选择题

阅读理解。

     A bus stops at a small bus stop. A man is hungry and he wants to buy some cakes.

It's raining(下雨) hard, he doesn't want to go out in the rain. He sees a boy. "Come here,

boy!" he cries. "Do you know how much the cakes are?" The boy says yes. The man

gives the boy four dollars (美元)and asks him to buy two cakes. "One is for you and one

is for me." Three minutes later, the boy comes back. He's eating a cake. He gives the man

two dollars and says: "Sorry, there is only one cake left."

1. Where is the man?

A. He's near the bus.  

B. He is at home.

C. He's in the bus.  

D. He is in the car.

2. The man doesn't want to go out because_____.

A. he is tired      

B. he doesn't like rain  

C. he is hungry      

D. it's raining hard

3. How many cakes does the boy get?

A. One  

B. Two      

C. Three      

D. Four

4. How much are they if the boy buy five cakes?

A. five dollars  

B. Four dollars  

C. Ten dollars    

D. Fifteen dollars

5. What's the result (结果)?

A. The man eats the cake.

B. The boy eats the cake.

C. The boy doesn't eat the cake.

D. The boy and the man both eat the cakes.

题型:选择题

男性,62岁。2天前出现右上腹阵发性绞痛,伴皮肤黄染。6个月前曾行B超检查,示胆囊结石。该患者的诊断最可能是()

A.肝癌

B.胰头癌

C.胆石症

D.急性肝炎

E.急性胰腺炎

题型:选择题

(15分)图1是等元素单质的熔点高低的顺序,其中c、d均是热和电的良导体。 (1)图中d的单质对应元素原子的电子排布式是                    

(2)单质a、b、f对应的元素以原子个数比1:1:1形成的分子中含   键,   键。

(3)a与b的元素形成的10个电子中性分子X的空间构型为       ;将X溶于水后的溶液滴入到含d元素高价离子的溶液中至过量,生成d元素的离子化学式为    ,其中X与d 高价离子之间以      键相结合。

(4)图2是上述六种元素中的一种元素形成的含氧酸的结构,请简要说明该物质易溶于水的原因:                                                                     

(5)图中C单质的晶体堆积方式类型是     ,这种堆积方式晶胞中原子的配位数为      

 

  

图1                                   图2

题型:选择题

急性化脓性髋关节炎小儿,突然发生髋关节剧痛,呈屈曲内收、内旋位,弹性固定,除应用抗生素外最宜选用何种治疗()。

A.手法整复与石膏固定

B.手法整复与小夹板固定

C.切开复位引流+持续皮肤牵引

D.持续骨牵引

E.切开引流加皮牵引

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