影响健康信息传播效果的主要因素不包括（） A.传播者 B.信息 C.环境 D.传播途

---No words are strong enough to express our thanks for your coming.

---_______.

A．It’s a pity

B．I hope so

C．It’s my pleasure

D．With pleasure

请简单解释什么是酸化。

阅读下面的短文，并完成短文后的任务。

Draw a giraffe in your mind. How did you draw your giraffe? Does it have a long neck? Does it have long legs? Is it really tall? When people think of giraffes, they think of their long necks. A long neck and four long legs make the giraffe the tallest land animal on earth. A giraffe is 1.8m tall when it is born, and some giraffes get up to 6m tall when they are all grown up.

But did you know that giraffes also have long tongues? Have you seen the tongue of a giraffe before? A giraffe has a very long tongue which can hold and wrap (包) around objects. The tongue is designed for feeding, but it can be used in many different ways. For example, a giraffe can close its nose with its long tongue completely to keep out sand and dust. Also, a giraffe’s tongue is long enough to clean its owner’s ears as well!

The tongue is black in colour to protect it from getting sunburnt (晒伤). It is nearly 56cm long. Giraffe only eat plants, and a full grown giraffe can eat 33kg of leaves a day. When giraffes look for some tall trees to eat, they sometimes fight with elephants for food. Giraffes use their tongue to eat leaves from some tall trees. The giraffe’s tongue is a helpful tool for reaching leaves and breaking off branches.

任务一：根据短文内容回答下列问题。(注意：每题答案不超过10个单词)

小题1: What is this article mainly about?

_________________________________________________________________________

小题2:What does a giraffe feed on?

_________________________________________________________________________ 

小题3: What color is the tongue of a giraffe? Why?

________________________________________________________________________ 

小题4: Give two examples of the use of the giraffe’s tongue.

(1) ___________________________________ (2) __________________________________

小题5:任务二：将文中划线的句子翻译成汉语。

________________________________________________________________________

肾小球两端的血管里都流动脉血．______．

如果某种商品的价格上升导致另一种商品的需求量增加，这两种商品是（）

A.替代关系

B.互补关系

C.低档品

D.正常品