猪带绦虫病确诊的依据是（）。 A.粪便中查到带绦虫卵 B.粪便中发现链状带绦虫孕节

蛋黄中具有降低胆固醇作用的是（）

A.神经鞘磷脂

B.脑磷脂

C.卵磷脂

D.脑苷脂

E.谷固醇

雾是近地面大气层中出现大量微小水滴而形成的一种天气现象。当暖湿空气经过寒冷的下垫而时，就易形成雾。图3中，S市附近海域夏季多雾，并影响S市。据此完成问题。

夏季，S市主要受（）

A．季风影响

B．西风带影响

C．低压控制

D．高压控制

These days, young children can enjoy directly what it is like to be a marine biologist (海洋生物学家) at a marine association. What they discover can lead them to appreciate and protect the ocean and also the animals living in it.

At the present time, learning isn’t only limited to the classroom. It’s quite common for kids to learn from outdoor experiences. Teachers commonly take their pupils on field trips to museums as well as other interesting areas. If you wish to help pupils to take care of the ocean, one of the best areas to take them to is a marine association, the place where the ocean biome (生物圈) is shown.

Taking your pupils to a marine association is a prefect way to help them learn. Education professionals agree that there are topics that children can learn more successfully whenever they experience them directly.

Several organizations that focused on protecting the ocean now operate on the coast of different areas in America and all around the world. It’s quite common for marine associations nowadays to open their doors several times a week to kids, parents, and ocean lovers to learn more about the ocean biome.

A marine association has different programs for children of different ages. You’ll find programs that are developed specially for pupils. Pupils are involved in interactive (互动的) learning. This learning experience allows young children to recognize the value of the role each species performs in their environment. They not only get to research creatures from the ocean, but they also get to see, touch, and smell most of these animals and plants. This type of exposure offers students an idea about the life of a marine scientist. It could help them choose a career afterwards.

These programs are generally held on Saturdays and Sundays in order that kids and parents can have more hours in which to have fun. Teachers who want to arrange these activities for their students can call a local marine association near them.

小题1:According to the text, pupils can have a better understanding of the ocean biome by _______.

A．learning about it from books

B．going to a marine association

C．attending marine biologists’ meetings

D．taking part-time jobs at marine associations小题2:In Paragraph 5, the author mainly wants to tell us _______.

A．the advantage of learning at a marine association

B．different activities offered by a marine association

C．a marine association’s working conditions

D．the way to develop children’s interest in ocean小题3:The underlined word “exposure” in Paragraph 5 probably means _______.

A．the way of explaining something

B．the way of choosing a career

C．a marine association’s working condition

D．the way to develop children’s interest in the ocean小题4:Which of the following is TURE?

A．Young children can enjoy indirectly what it is like to be a marine biologist at a marine association.

B．To help your pupils to take care of the ocean, the best area to take them to is a marine association.

C．Children can learn the topics more successfully when they experience them directly.

D．A marine association has the same program for children of different ages.小题5:The text is most probably taken from _______.

A．a teacher’s presentation

B．a marine biologist’s report

C．a student’s field trip journal

D．an introduction to a marine association

下列说法有误的一项是[ ]

A．《大自然的语言》一文中大自然的语言实质是指大自然的各种物候现象。

B．《生物入侵者》介绍了关于生物通过非自然途径可能对人类造成危害的知识，是一篇事物的说明文。

C．《恐龙无处不在》实质上是通过南极恐龙化石的发现来证明“板块结构”学说的科普论文。

D．《奇妙的克隆》用四个标题领起四个部分，从不同侧面说明克隆，但前后又有紧密的逻辑联系。

在络合滴定中EDTA与金属离子形成络合物，它们的络合比一般为（）。

A.1：1

B.1：2

C.1：3