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问题 解答题

某粮食加工厂准备运出一批大米，已经装满42袋，每袋50千克，还剩1600千克．要运出的这批大米一共是多少千克？

答案

42×50+1600

=2100+1600

=3700（千克）

答：要运出的这批大米一共是3700千克．

单项选择题

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 (91) on the individual suggest that children engage in criminal behavior (92) they were not sufficiently penalized for previous misdeeds or that they have learned criminal behavior through (93) with others. Theories focusing on the role of society suggest that children commit crimes in (94) to their failure to rise above their socioeconomic status, (95) as a rejection of middle, class values.
Most theories of juvenile delinquency have focused on children from disadvantaged families, (96) the fact that children from wealthy homes also commit crimes. The latter may commit crimes (97) lack of adequate parental control. All theories, however, are tentative and are (98) to criticism.
Changes in the social structure may indirectly (99) juvenile crime rates. For example, changes in the economy that (100) to fewer job opportunities for youth and rising unemployment (101) make gainful employment increasingly difficult to obtain. The resulting discontent may in (102) lead more youths into criminal behavior.
Families have also (103) changes these years. More families consist of one-parent households or two working parents; (104) , children are likely to have less supervision at home (105) was common in the traditional family (106) . This lack of parental supervision is thought to be an influence on juvenile crime rates. Other (107) causes of offensive acts include frustration or failure in school, the increased (108) of drugs and alcohol, and the growing (109) of child abuse and child neglect. All these conditions tend to increase the probability of a child committing a criminal act, (110) a direct causal relationship has not yet been established.

A．contrarily

B．consequently

C．similarly

D．simultaneously
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单项选择题

64S型半自动闭塞当列车到达接车站电铃鸣响，但JBD不变黄灯是（）。

A、由于TCJ不失磁落下

B、由于接车轨道电路故障JGJ失磁落下 

C、由于DDJ不能自闭

D、由于TCJ的缓放时间过短 
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