如图为突触的结构,并在a、d两点连接一测量电位变化的灵敏电流计。请据图回答: (

题型:读图填空题

问题:

如图为突触的结构,并在a、d两点连接一测量电位变化的灵敏电流计。请据图回答:

(1)图中的结构涉及到_______个神经元,含有________个突触。

(2)如果B受刺激,C会兴奋;如果A、B同时受刺激,C不会兴奋。由此判断A、B释放递质的性质依次是__________、___________。

(3)细胞合成的递质,经过________加工,形成突触小泡,释放到突触间隙,与突触后膜上相应的“受体”结合,引起反应。“受体”的化学本质最可能是_______,这种细胞膜外的结构称为________。

(4)已知ab=bd,则刺激b点,灵敏电流计指针偏转_______次,如刺激c点,则偏转______次。

考点:各种细胞器的结构和功能反射神经冲动的产生和传导
题型:读图填空题

阅读理解。

     In the United States, parents usually encourage their children to develop their potential (潜能). They pay

attention to what their kids can do, not what they can't. As a result, US boys and girls hope to be actors,

athletes and doctors; many even want to become presidents when they grow up.

    US parents often encourage their children to take part in all kinds of activities at school. They believe that

joining in these activities can make their children mature (成熟). Schoolwork is important, but they think that

social skills are important as well.

     But things in China are different. Chinese parents often tell their children to study hard and pass exams.

They think that, for a student, staying away from schoolbooks means wasting time. This puts a lot of pressure

on Chinese students, so leaders in China's education department have called for less homework at the lower

grades. Only healthy kids can become healthy adults.

1. American parents think that _______. 

A. Schoolwork is as important as social skills 

B. Schoolwork is more important than social skills 

C. Schoolwork is less important than social skills 

D. Passing exams is the most important for their children

2. Why do many American children have their dream jobs? 

A. Because they start school earlier than Chinese children. 

B. Because they study hard. 

C. Because their parents encourage them to do less homework. 

D. Because their parents usually pay attention to what they can do,not what they can't.

3. Chinese parents think that _______. 

A. taking part in all kinds of activities at school can make their children mature 

B. staying away from schoolbooks means wasting time 

C. their children should do what they want to do 

D. social skills is necessary for the students at lower grades

4. According to this passage the writer thinks _______. 

A. China's education is better than America's 

B. America's education is better than China's 

C. Chinese students at the lower grades should have more homework 

D. Chinese students have less pressure than America's

题型:读图填空题

化学兴趣小组为测定某石灰石样品中碳酸钙的质量分数,取26g石灰石样品放在烧杯中,然后向其中逐渐加入稀盐酸,使之与样品充分反应,恰好完全反应(杂质不参加反应)时,加入稀盐酸的质量为90g,反应后烧杯中物质的总质量为105g.请计算:

(1)反应生成二氧化碳的质量

(2)样品中碳酸钙的质量分数(结果保留到0.1%)

题型:读图填空题

若业主大会成立并选聘了物业服务企业,即将相应终止的是()。

A.物业服务合同

B.前期物业服务合同

C.物业保险合同

D.物业管理合同

题型:读图填空题

狄法尔磨耗试验机(双筒式磨耗试验机)

题型:读图填空题

质量管理文件可分为质量标准与规定、质量控制与保证、技术管理规定。

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