皮皮学，免费搜题
登录
搜题
【简答题】
(1) “用微观的眼光看世界”是学习化学的重要方法。按要求填空。 ①原子结构示意图 表示____________（填写元素符号）； ②若“ ”表示一个氢原子，则“ ”表示____________（填写物质化学式）； ③符号“SO 4 2－ ”表示________________（填写粒子名称）。 (2)化学知识与生活联系密切。请用食醋、酒精、氮气、活性炭、食盐、硝酸钾填空。 ①空气中含量最多的气体___________， ②用作燃料____________， ③除去铝壶中的水垢____________， ④除去冰箱异味_______________， ⑤腌制鱼肉等常用的调味品__________， ⑥在农业上可用作复合肥______________。 (3)科学的饮食可以保证我们的健康。 ①日常生活中注意多食用蔬菜、水果，以补充各种维生素。因缺乏维生素C而引起的疾病是（填序号，下同）____________。 a．坏血病     b．龋齿     c．夜盲症 ②钙元素与人体健康密不可分。下列有关钙元素的叙述中，错误的是_____________。 a．人体中钙元素大部分存在于骨骼和牙齿中 b．老年人缺钙会出现骨质疏松，容易发生骨折 c．成年人比幼儿和青少年需要摄入更多的钙 d．幼儿及青少年缺钙会得佝偻病和发育不良 ③制作虾饺的主料有猪肉、虾仁、竹笋、面粉等，以上食品均能提供能量，提供能量的营养素有糖类、____________、_______________。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】推动武术发展的主要动力是
A.
原始战争
B.
狩猎
C.
生产劳动
D.
武举考试
查看完整题目与答案
【单选题】听力原文：W: Hi, John. M: Oh ! Hi, Laura. What are you doing here? W: Uh. I'm usually here on weekends. It's my dad's shop. So you are looking for a bike? M: Yeah. Now that the weather is warming up, I tho...
A.
She's waiting for her father.
B.
She's having her bicycle repaired.
C.
She wants to surprise John.
D.
She works there.
查看完整题目与答案
【单选题】Refer to Exhibit 7-1. If in the schedule, total consumer surplus equals $5, the market price of a jazz CD is: Price of Jazz CDs Quantity of Jazz CDs $30 1 $25 2 $20 3 $15 4 $10 5
A.
$10.
B.
$15.
C.
$20.
D.
$25.
查看完整题目与答案
【单选题】Refer to Exhibit 7-2. What is the total amount of consumer surplus assuming this market reaches equilibrium? Price Quantity Demanded Quantity Supplied $1.00 7 1 $2.00 6 2 $3.00 5 3 $4.00 4 4 $5.00 3 5...
A.
1
B.
2
C.
3
D.
6
查看完整题目与答案
【单选题】Refer to Exhibit 7-2. What is the total amount of producer surplus assuming this market reaches equilibrium? Price Quantity Demanded Quantity Supplied $1.00 7 1 $2.00 6 2 $3.00 5 3 $4.00 4 4 $5.00 3 5...
A.
1
B.
2
C.
3
D.
6
查看完整题目与答案
【单选题】Refer to Exhibit 3-7. The diagram represents a tradeoff in an economy between prison cells and classrooms. Which position represents the choice to allocate the greatest amount of resources to producin...
A.
B.
C.
D.
None of the above are correct. Points on the frontier show the efficient combinations of resources that produce equal quantities of both outputs.
查看完整题目与答案
【判断题】预付年金终值系数与资本回收系数互为倒数。( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】下面列出的四项中,不属于计算机病毒特征的是 。
A.
免疫性
B.
潜伏性
C.
激发性
D.
传播性
查看完整题目与答案
【单选题】Refer to Exhibit 7-2. What is the consumer surplus of the 2nd unit consumed assuming this market reaches equilibrium? Price Quantity Demanded Quantity Supplied $1.00 7 1 $2.00 6 2 $3.00 5 3 $4.00 4 4 ...
A.
1
B.
2
C.
3
D.
7
查看完整题目与答案
【单选题】Refer to Exhibit 3-7. If the economy moves from Point C to Point A in the diagram:
A.
more prison cells are created.
B.
more classrooms are created.
C.
it sacrifices an increasing quantity of classrooms per prison cell produced the further the movement toward Point
D.
there is no net change in the number of prison cells and classrooms, as all points on the frontier are equally efficient.
查看完整题目与答案
相关题目：
【单选题】推动武术发展的主要动力是
A.
原始战争
B.
狩猎
C.
生产劳动
D.
武举考试
查看完整题目与答案
【单选题】听力原文：W: Hi, John. M: Oh ! Hi, Laura. What are you doing here? W: Uh. I'm usually here on weekends. It's my dad's shop. So you are looking for a bike? M: Yeah. Now that the weather is warming up, I tho...
A.
She's waiting for her father.
B.
She's having her bicycle repaired.
C.
She wants to surprise John.
D.
She works there.
查看完整题目与答案
【单选题】Refer to Exhibit 7-1. If in the schedule, total consumer surplus equals $5, the market price of a jazz CD is: Price of Jazz CDs Quantity of Jazz CDs $30 1 $25 2 $20 3 $15 4 $10 5
A.
$10.
B.
$15.
C.
$20.
D.
$25.
查看完整题目与答案
【单选题】Refer to Exhibit 7-2. What is the total amount of consumer surplus assuming this market reaches equilibrium? Price Quantity Demanded Quantity Supplied $1.00 7 1 $2.00 6 2 $3.00 5 3 $4.00 4 4 $5.00 3 5...
A.
1
B.
2
C.
3
D.
6
查看完整题目与答案
【单选题】Refer to Exhibit 7-2. What is the total amount of producer surplus assuming this market reaches equilibrium? Price Quantity Demanded Quantity Supplied $1.00 7 1 $2.00 6 2 $3.00 5 3 $4.00 4 4 $5.00 3 5...
A.
1
B.
2
C.
3
D.
6
查看完整题目与答案
【单选题】Refer to Exhibit 3-7. The diagram represents a tradeoff in an economy between prison cells and classrooms. Which position represents the choice to allocate the greatest amount of resources to producin...
A.
B.
C.
D.
None of the above are correct. Points on the frontier show the efficient combinations of resources that produce equal quantities of both outputs.
查看完整题目与答案
【判断题】预付年金终值系数与资本回收系数互为倒数。( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】下面列出的四项中,不属于计算机病毒特征的是 。
A.
免疫性
B.
潜伏性
C.
激发性
D.
传播性
查看完整题目与答案
【单选题】Refer to Exhibit 7-2. What is the consumer surplus of the 2nd unit consumed assuming this market reaches equilibrium? Price Quantity Demanded Quantity Supplied $1.00 7 1 $2.00 6 2 $3.00 5 3 $4.00 4 4 ...
A.
1
B.
2
C.
3
D.
7
查看完整题目与答案
【单选题】Refer to Exhibit 3-7. If the economy moves from Point C to Point A in the diagram:
A.
more prison cells are created.
B.
more classrooms are created.
C.
it sacrifices an increasing quantity of classrooms per prison cell produced the further the movement toward Point
D.
there is no net change in the number of prison cells and classrooms, as all points on the frontier are equally efficient.
查看完整题目与答案