产业结构政策的核心内容是（）。 A.产业发展的重点顺序选择问题 B.协调竞争与规模经

（6分）某物理兴趣小组学习了导体电阻的知识后，对食盐水溶液的导电性能与什么因素有关提出了以下猜想：

①食盐水溶液的导电性能与溶液的浓度有关。

②食盐水溶液的导电性能与溶液的质量有关。

③食盐水溶液的导电性能与溶液中两点间的距离有关。

为了验证猜想，他们设计了如图所示的装置，将电路中的a，b两金属片分别插为甲、乙、丙、丁溶液中所示的位置（金属片a，b每次插入溶液中的深度都相同）进行探究：

（1）食盐水溶液的导电性能可以由     来判断；

（2）将金属片a，b分别插为甲、乙所示位置可探究猜想     （选填序号），为了探究猜想②应将金属片a，b分别插为     两图所示位置；

（3）将金属片a，b分别插为乙、丁所示位置，若I乙≠I丁，由此可得到的结论是：     ，

（4）这个实验用到了初中物理学中最常用的探究方法是     。

(C)

Can dogs and cats live in perfect harmony in the same home People who are thinking about adopting a dog as a friend for their cats are worried that they will fight. A recent research has found a new recipe of success. According to the study, if the cat is adopted before the dog, and if they are introduced when still young (less than 6 months for cats, a year for dogs), it is highly probable that the two pets will get along swimmingly. Two-thirds of the homes interviewed reported a positive relationship between their cat and dog.

However, it wasn’t all sweetness and light. There was a reported coldness between the cat and dog in 25% of the homes, while aggression and fighting were observed in 10% of the homes. One reason for this is probably that some of their body signals are just opposite. For example, when a cat turns its head away it signals aggression, while a dog doing the same signals submission.

In homes with cats and dogs living peacefully, researchers observed a surprising behavior. They are learning how to talk each other’s language. It is a surprise that cats can learn how to talk "Dog", and dogs can learn how to talk "Cat".

What’s interesting is that both cats and dogs have appeared to develop their intelligence. They can learn how to read each other’s body signals, suggesting that the two may have more in common than we previously suspected. Once familiar with each other’s presence and body language, cats and dogs can play together, greet each other nose to nose, and enjoy sleeping together on the sofa. They can easily share the same water bowl and in some cases groom (梳理) each other.

The significance of the research on cats and dogs may go beyond pets—to people who don’t get along, including neighbors, colleagues at work, and even world superpowers. If cats and dogs can learn to get along, surely people have a good chance.

What is found surprising about cats and dogs（）

A. They eat and sleep each other.

B. They observe each other’s behaviors.

C. They learn to speak each other’s language.

D. They know something from each other’s voices.

患者尿量<0.5ml/（kg/h），尿Na⁺<20mmol/L，排Na⁺分数<0.01，血浆Na130mmol/L，pH7.34，治疗时首选（）

A.乳酸钠林格液

B.5%白蛋白

C.呋喃苯胺酸

D.甘露醇

E.海脉素（血代）

既能够治疗蛔虫、蛲虫证，又善疗小儿疳疾的药物是（）

A.使君子

B.苦楝皮

C.鹤草芽

D.南瓜子

E.槟榔

对于逐步结转分步法，下列说法中正确的有（）。

A.各步骤的在产品成本是狭义在产品成本

B.各步骤的在产品成本是广义在产品成本

C.需要计算各步骤半成品成本

D.半成品成本随着半成品实物的转移而转移

E.半成品成本不随半成品实物转移而转移