CSF功能包括（） A.缓冲保护 B.调节颅内压 C.提供营养物质 D.清除代谢产物

Many theories concerning the causes of juvenile delinquency (crimes committed by young people) focus either on the individual or on society as the major contributing influence. Theories (51) on the individual suggest that children engage in criminal behavior (52) they were not sufficiently penalized for previous misdeeds or that they have learned criminal behavior through (53) with others. Theories focusing on the role of society suggest that children commit crimes in response to their failure to rise above their socioeconomic status, (54) as a rejection of middle-class values. Most theories of juvenile delinquency have focused on children from disadvantaged families, ignoring the fact that children from wealthy homes also commit crimes. The latter may commit crimes (55) lack of adequate parental control. All theories, however, are tentative and are (56) to criticism. Changes in the social structure may indirectly (57) juvenile crime rates. For example, changes in the economy that lead to fewer job opportunities for youth and rising unemployment (58) make gainful employment increasingly difficult to obtain. The resulting discontent may in turn lead more youths into criminal behavior. Families have also (59) changes these years. More families consist of one-parent households or two working parents; consequently, children are likely to have less supervision at home (60) was common in the traditional family structure. This lack of parental supervision is thought to be an influence on juvenile crime rates.

55().

A.on 

B.in 

C.for 

D.with

—You never stay up till midnight, do you?

—___________. But I think it’s bad for our health.

A．No, never

B．No, sometimes

C．Yes, never

D．Yes, sometimes

实验中刺激神经纤维，其动作电位传导的特点是

A．呈衰减性传导

B．呈双向传导

C．连续的多个动作电位可融合

D．电位幅度越大传导越慢

E．刺激越强，传导越快

下图中的所列物质是九年级目前所学常见物质间的反应关系，其中A是蓝色溶液，D是浅绿色溶液。试回答下列问题                         

（1）用化学式表示：C__________， F__________。

（2）反应①用化学方程式表示为：_____________                                    

（3）反应②反应时的现象为：______________

根据所提供的原始单据，按照报关单填制规范的要求，在报关单相应的选项中，选出最合适的答案。

浙江浙海服装进出口公司(3313910194)在对口合同项下进口蓝湿牛皮，委托浙江嘉宁皮革有限公司(3313920237)加工牛皮沙发革。承运船舶在帕腊纳瓜港装货启运，航经大阪，又泊停釜山港转“HANSA STAVANGER”号轮HV300W航次(提单号：HS03D8765)，于2003年7月30日抵吴淞口岸申报进境。经营单位委托上海某货运代理公司持C29083100693号手册和310200103036124号入境货物通关单(代码：A)于次日向海关申报货物进口。该货物法定计量单位为：kg，海运费、港杂费合计1500美元，保险费为140美元。

“贸易方式”栏应填（）。

A．来料加工

B．进料加工

C．进料对

D．三资进料加工