科学研究对象从广义上讲，是指客观世界包括（）。

下列物质中，能够导电的电解质是 [ ]

A．Cu丝

B．熔融的MgCl₂

C．NaCl溶液

D．蔗糖

B

I have never been able to make sense of my idea    31  money. I can walk into a store and spend $ 700 on suit,   32  go home and squeeze(挤)three cups of tea out of a single teabag. Am I a spendthrift or a miser or both?

A spendthrift is a person   33   likes to spend money. He always buys things 34    regard to cost. All of his spending gives him   35   (please), so he enjoys 36.    with shopping spending. He is both warmhearted and free - handed. He has a lot of friends    37   he often treats everybody to drinks and meals. He would even give or lend money to his   38 (bad)  enemy! Some people can accept a spendthrift's habits very easily. They consider such a person inexperienced,  39they enjoy being with him.

Are you a little like the person just  40    (write) about? If you are one of the big spenders of the world, you will always have debts, but you may have a lot of fun, too.

—Today I can't go with you. There will be an English test tomorrow. 

—_______. Maybe next time.[ ]

A. It doesn't matter.

B. My pleasure.

C. I don't think so  

D. Sorry to hear that.

授予专利权的对象一般包括( )。

A．工艺流程

B．发明

C．材料配方

D．外观设计

E．实用新型

城市公共交通线网的基本类型包括放射型线网、方格型线网和( )。

A．放射环形线网
B．直线型线网
C．复线型线网
D．环形型线网