下列各实验装置图与操作正确且能达到实验目的的是 A.待KNO3热饱和溶液冷却

题型:选择题

问题:

下列各实验装置图与操作正确且能达到实验目的的是

      

A.待KNO3热饱和溶液冷却

B.用工业酒精制取无水乙醇

结晶后进行快速过滤

C.实验室收集SO2气体

D.实验室干燥氨气

考点:化学实验的基本操作化学实验安全危险化学品的标志化学药品的变质
题型:选择题

综合阅读。

       Is there a chocolate-powered racing car in the world? Hey! You have read too (A)______ children's books!

But wait! Now, there is really such a racing car in the world. A team from a British university made it. 

      The chocolate-powered racing car's engine (发动机) uses waste from chocolate factories or vegetable oil

as fuel (燃料). Its body (B) 土豆制成, its steering wheel is made from carrots, its seat is made of soybeans,

(C)_______ its brake pads (刹车片) are made from nuts! Well, can this car run very fast? (D) Certainly! It can

go from zero to 60 miles per hour in 2.5 seconds, and go as fast as 135 miles per hour. When the racing car is

running, it cleans itself and lets out oxygen. 

      "It took us more than nine months to (E) complete the racing car," said a team member. "The car is really

green. You can find many of the car's parts at a farmer's market or even in a litter bin because most of the

materials (材料) are waste in most people's eyes. It's fun."

       However, (F) this eco-friendly (环保的) car cannot be driven in the official (正式的) race because of the

engine's unusual flue.

1.在文中(A)和(C)的空白处分别填入适当的词 _______  _______

2.将文中划线部分(B)译成英语:_______

3.写出文中划线部分(D)和(E)的同义词语或近义词语:_______  _______

4.将文中划线部分(F)改写为:the engine's unusual flue makes it _______ to _______ this eco-friendly car in

     the official race

5.从文中找出能说明本文中心大意的短语:_______

题型:选择题

请你协助小欣同学填写如下实验报告。

实验目的:探究铜绿的性质实验用品:(略)

实验过程及现象记录:

(1)观察铜绿的颜色和状态等物理性质:铜绿是___________色固体;

(2)将铜绿粉末用__________分别加到两支试管中;

(3)用__________向一支试管中逐滴滴加稀盐酸,观察到铜绿溶解,溶液呈___________色,同时有大量气泡产生;

(4)将另一支试管在酒精灯的外焰上加热(注意:加热时要先均匀加热后再集中加热),一段时间后,观察到绿色粉末逐渐变成__________色,试管口有水滴滴出。

结论:铜绿具有的化学性质是(Ⅰ)____________ ;(Ⅱ)_______________ 。

题型:选择题

电信建筑的消防用电,一般由()保证电源供电。

A.传输机房或电力室

B.配电室或电力室

C.传输机房或配电室

D.交换机房或电力室

题型:选择题

下列程序的功能是通过字符变量操作竖向显示“伟大祖国”,横向显示“祖国伟大”,请填空。
SET TALK OFF
STOR“伟大祖国”TO XY
CLEAR
N=1
DO WHILE N<8
7SUBSTR [3]
N-N+2
ENDDO
[4]
SUBSTR(KY,1,4)
RETURN

题型:选择题

关于胃动脉瘤,叙述错误的是()

A.病变最多见于小弯近侧

B.呈现管径较大、扭曲的厚壁小动脉

C.一般多发,常累及胃壁全层

D.动脉壁常见淀粉样物质沉积

E.可继发破裂引起致命性大出血

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