在下列符号中,能表示一个原子,又能表示一种元素,还能表示一种物质的是( ) A.

题型:选择题

问题:

在下列符号中,能表示一个原子,又能表示一种元素,还能表示一种物质的是(  )

A.Cu

B.O

C.H2

D.N

考点:化学式的写法和意义元素符号的意义及写法
题型:选择题

Packaging is an important form of advertising.A package can sometimes motivate someone to buy a product.For example, a small child might ask for a breakfast food that comes in a box with a picture of a TV character.The child is more interested in the picture than in breakfast food.Pictures for children to color or cut out, games printed on a package, or a small gift inside a box also motivate many children to buy products or to ask their parents to buy for them.

Some packages suggest that a buyer will get something for nothing.Food products sold in reusable containers are examples of this.Although a similar product in a plain container might cost less, people often prefer to buy the product in a reusable glass or dish, because they believe the container is free.However, the cost of the container is added to the cost of the product.The size of a package also motivates a buyer.Maybe the package had “Economy Size” or “Family Size” printed on it.This suggests that the larger size has the most product for the least money.But that is not always true.To find it out, a buyer has to know how the product is sold and the price of the basic unit.

The information on the package should provide some answers.But the important thing for any buyer to remember is that a package is often an advertisement.The words and pictures do not tell the whole story.Only the product inside can do that.

小题1:From the passage we know the buyer pays more attention to __________.

A.the size of a container

B.a container with attractive picture

C.a well-designed container

D.a plain container with low cost小题2:What suggestion does the author give in the passage?

A.It’s not good to buy the product which is sold in a glass or dish.

B.The quality of a container has nothing to do with the quality of the product.

C.The best choice for a buyer is to buy a product in a plain package.

D.A buyer should buy what he needs most rather than a well-designed package.小题3:What is the best title for the passage?

A.How to Package a Product.

B.How to Make an Advertisement.

C.How to Sell Product.

D.How to Treat the Package Wisely.

题型:选择题

关于妊娠合并心脏病,下列哪项叙述不正确()。

A.妊娠、分娩等均能使心脏病患者的心脏负担加重,诱发心力衰竭

B.降低妊娠合并心脏病的死亡率必须从预防着手

C.对于有心脏病的育龄妇女,要做到孕前咨询,确定能否妊娠

D.有心脏病的孕妇,产前保健要求与普通孕妇相同

E.妊娠合并心脏病者,充分休息,减少氧耗量

题型:选择题

直接投递是指按秘密载体________________直接投交收件单位的投递方式。

题型:选择题

一位著名企业家从百折不挠的拼搏经历中总结出了“冰淇淋哲学”,即卖冰淇淋必须从冬天开始,因为冬天顾客少,会逼迫你降低成本,改善服务。如果能在冬天生存,就再也不会害怕夏天的竞争。 根据本段文字,“冰淇淋哲学”主要强调了:

A.逆境对培养企业的竞争力非常重要

B.选择一个好的时机,企业就成功了一半

C.企业在创业阶段难免会遇到很多困难

D.企业应注重降低成本,提高服务质量

题型:选择题

体细胞胚胎发生

更多题库