编制食谱时首先要计算（）A.主食用量 B.副食用量 C.蔬菜用量 D.调味品用

图1是当A接受一定强度刺激后引起F收缩过程的示意图。图2为图1中某结构的放大示意图。请回答：

(1)图1中F表示的结构是_________，图2是图1中______（填字母）的亚显微结构放大模式图，

(2)图2的结构名称是___________，结构②的名称是____________。缩手时，兴奋从①传到②的信号物质是_______________

(3)用针刺A时，引起F收缩的现象被称为_____________。针刺引起疼痛，产生痛觉的部位是_________________。

(4)当兴奋在神经纤维B上传导时，兴奋部位的膜内外两侧的电位呈__________________。

(5)如果在图2中①和②的间隙处注射乙酰胆碱，②处发生的变化是______________(兴奋、抑制)，原因是乙酰胆碱引起结构②____________________变化。

As most people know, in the past few years, sandstorms have swept across many cities and areas of North China, polluting the air and disturbing daily lives of human beings. People look dirty and suffer many kinds of illnesses, such as breath difficulty. The sandstorm is such a serious problem that it has not only undermined the industrial and agricultural development of our country but also caused a lot of trouble to the living conditions of the Chinese people. It is expected that effective(有效的) measures should be taken as soon as possible through our joint efforts to limit its occurrence.

So what should we do with the frightening sandstorms? Some experts put forward practical suggestions as follows: For one thing, more funs(基金)ought to be put into tree planting and forest protection so as to keep more water resources within the surface of the earth. For another, governments of all countries should make laws on environmental protection.For example, banning the use of throw-away chopsticks and punishing illegal tree cutting. Scientists should also study and find ways to cut down the degree of its destruction and to improve the whole environment.

How people look forward to sunny days with little breeze(微风)touching their faces now and forever! Nevertheless, I am fully confident that the golden days can come back so long as everyone tried his best to protect natural environment from today on.

小题1:The underlined word”undermined”(in Paragraph 1)means __________.

A．weakened

B．encouraged

C．kept

D．made小题2:From the first paragraph, we can infer _________.

A．China has taken no measures to prevent sandstorms.

B．sandstorms can cause much damage to human beings and their daily lives.

C．the sandstorm is the most dangerous natural disaster to human beings.

D．more sandstorms will happen in the near future in North China.小题3:How many ways do some experts put forward to fight against sandstorm?

A．5

B．4

C．3

D．2小题4:What’s the author’s attitude towards the situation to sandstorms’ problems?

A．Unconfident

B．Optimistic

C．Regretful

D．Satisfied

Photoshop图像新建对话框中包含以下五种色彩模式：（）、（）、（）、（）、（）。

冠心病为何引起心力衰竭

A．长期高脂饮食

B．心肌收缩无力

C．长期高血糖

D．长期吸烟

E．高血压

下图为神经纤维受刺激后所测得的膜电位变化，A、B、C、D为四种测量方式，其中能测出这种膜电位变化的是（）

A、选项A  

B、选项B 

C、选项C 

D、选项D