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问题 选择题

下列图示实验操作中，正确的是

A．稀释浓硫酸

B．读取液体体积

C．滴加液体

D．CO2的验满

答案

B 

 

题目分析：A选项稀释浓硫酸要酸入水；B选项读取液体的体积，实现与量筒中的液体最低处保持水平是正确的叙述；C选项滴加液体要悬空垂直滴加；D选项二氧化碳的验满，燃着的木条放到集气瓶口，故答案选择B 

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 (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.

59().

A.survived 

B.noticed 

C.undertaken 

D.experienced
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阅读理解与欣赏

课内阅读我最棒。

　　过了好长时间，鱼竿突然剧烈地抖动了一下，一定是个大家伙上钩了。我小心翼翼地一收一放，熟练地操纵着。也许是鱼想摆脱我的鱼钩，不停地甩动着鱼尾并跳跃着，湖面上不时发出“啪啪”的声音，溅起不少水花。我等那条鱼挣扎得筋疲力尽了，迅速把它拉上岸来。啊，好大的鱼！我从来没有见过这么大的鲈鱼。我和父亲得意地欣赏着这条漂亮的大鲈鱼，看着鱼鳃在银色的月光下轻轻翕动着。

1．用“＼”画去加粗字的错误读音。

操纵（zòng  cǒng）　　甩动（suǎi  shuǎi）

2．写出下列词语的近义词。

剧烈——（　　）　　挣扎——（　　）

3．读下面的句子，写出“我”不想放掉鲈鱼的理由。

　　过了好长时间，鱼竿突然剧烈地抖动了一下，一定是个大家伙上钩了。我小心翼翼地一收一放，熟练地操纵着。

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