下列属于学龄前儿童的膳食指南内容的是( )。 A．每天饮奶 B．养成不偏食的饮食习

血液循环为体循环（大循环）与肺（小循环）二部分，体循环的血液最后回流到（）

A．左心室

B．右心室

C．左心房

D．右心房

仔细阅读下面短文并按照语境完成填空(每空只能填一个单词)

     Recently our classmates have had a heated discussion about the topic "Environment or economy, must we choose?" .Some students are in 1._______ of the development of environment, while others put

economy above environment.

     The students 2.______ are worried about the environment say that many plants and animals have died and fish are even given no time to lay eggs. Besides, water and air are seriously polluted, causing people

sick. While we damage our environment, we keep producing more and more people who need more land

to live 3.________ and more food to eat.

     As to the students for economy, they think, first of all, people are more important 4.______ plants and animals. As a matter of fact, many companies and factories are very concerned 5._______ the

environment and have a sense of responsibility. In addition, with the development of economy, more jobs will be created.

     In my opinion, firstly, we should produce more things from recycled materials, and less 6._______ raw materials. 7._________, more effective laws to preserve the environment should be made, which controls the scale(规模)of trees-cutting and fish-catching. Thirdly, we try to live an environmentally friendly way of

life and pay slightly higher prices for things 8.______ are environmentally friendly. Finally, companies

producing chemical waste should pay higher taxes. With these measures, I believe that a healthy

environment and a stable(稳定的)economy should be possible at the same time.

下述IC工厂外部振源各种传播途径中，正确的是（）。

A.外部振源→主体结构→地基基础→精密设备

B.外部振源→精密设备→主体结构→地基基础

C.外部振源→地基基础→主体结构→精密设备

D.外部振源→精密设备→地基基础→主体结构

消补兼施，主治脾胃虚弱，食少难消，脘腹痞闷，大便溏薄之证的方剂是（）

A.保和丸

B.健脾丸

C.实脾散

D.枳实导滞丸

E.枳实消痞丸

我们断路器的通讯和现在通用的局域网通讯方式有什么相似之处？能不能加入到现有的通讯网络中？