(6分)生活中许多常用器具都是搪瓷器具。搪瓷是指在钢铁坯体表面涂上陶瓷,经高温烧

题型:填空题

问题:

(6分)生活中许多常用器具都是搪瓷器具。搪瓷是指在钢铁坯体表面涂上陶瓷,经高温烧结而成,这不仅使器具美观,且能对内部钢铁坯体起保护作用。

(1)搪瓷属于             

A.金属材料

B.无机金属材料

C.合成材料

D.复合材料(2)发生碰撞时,搪瓷器具表面的陶瓷易脱落,破损后露出的坯体易生锈,为延长破损搪瓷器具的使用寿命,可采用的一条补救措施是                                  

(3)酸菜鱼(汤汁显较强的酸性)是某地特色菜,出锅时通常用搪瓷器具而不用不锈钢盆具盛装,主要原因是                                      

考点:化学元素和人体健康六大营养素化学图标家庭小实验、趣味实验
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阅读短文,判断句子的对错,对的打“√”,错的打“×”。
Here is a list for Sarah's Sunday
      I'm going to get up at 8 o'clock on Sunday morning. Then I'll help my mother tidy the room. I'm going to
sweep the floor, wash the clothes and dishes in the afternoon. I want to visit my grandfather at 3 o'clock. I'm
going to buy a comic book at the bookstore. I'm going to watch TV in the evening. I'm going to go to bed at
10 o'clock at night.
( ) 1. Sarah is in bed at 9 o'clock on Sunday morning.
( ) 2. Sarah and her mother are going to clean the room on Sunday morning.
( ) 3. Sarah wants to visit her aunt in the afternoon.
( ) 4. She is going to buy a magazine at the bookstore.
( ) 5. Sarah is going to watch TV at 10 o'clock at night.
( ) 6. Sarah is helpful at home.
( ) 7. Sarah doesn't like comic books.
( ) 8. Sarah is not going to sweep the floor on Sunday.
( ) 9. Sarah is going to watch TV in the evening.
( ) 10. Sarah is a good girl.  
题型:填空题

根据《消防法》中关于消防设施的含义,消防设施不包括()。

A.消防车 

B.自动灭火系统 

C.消火栓系统 

D.应急广播

题型:填空题

如图所示,虚线MO与水平线PQ相交于O,二者夹角θ=30°,在MO左侧存在电场强度为E、方向竖直向下的匀强电场,MO右侧某个区域存在磁感应强度为B、垂直纸面向里的匀强磁场,O点处在磁场的边界上,现有一群质量为m、电量为+q的带电粒子在纸面内以速度v(0≤v≤)垂直于MO从O点射入磁场,所有粒子通过直线MO时,速度方向均平行于PQ向左,不计粒子的重力和粒子间的相互作用力,求:  

(1)速度最大的粒子自O开始射入磁场至返回水平线POQ所用的时间.  

(2)磁场区域的最小面积.

(3)根据你以上的计算可求出粒子射到PQ上的最远点离O的距离,请写出该距离的大小(只要写出最远距离的最终结果,不要求写出解题过程)。

题型:填空题

用盈余公积弥补亏损时,应借记“利润分配”账户,贷记“盈余公积”账户。 ( )

题型:填空题

通常来说,财产可以分为的类型包括()

A、动产

B、不动产

C、有价证券

D、知识财产

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