(26)Those who argue for the playing time for children suggest that children at a very early age are still too young to focus their attention on learning.Their brain may not be ready for serious studies such as comprehension and memorizing learning materials.These people are partially right,for it is true that young children can hardly concentrate.Their attention on one thing lasts for no longer than 15 minutes or so.(27)But we can arrange classes for shorter periods,can't we? And we can shift teaching subjects.Through putting them to study,young children are occupied with learning but not with playing.
(28)Those who argue for children's early commencement for formal education believe that being put to studies,children can develop good habit of studying, for the process of learning helps develop children's mental abilities like the ability to memorize,the ability to understand and the ability to do simple calculation.(28)Children's habit of studying and love for learning are of great importance to youngsters because these two things set up the sound foundation for their future studies.
(29)Having children start formal education at a very early age benefits young children much more than simply letring them play most of their time.A good babit needs a long time to develop to become a second nature.More importantly,it is better to develop a good habit before a bad one may grow.
(33)
A.They do not know what to learn.
B.They are too young to concentrate their attention for a long time.
C.They are occupied with learning.
D.They set up the sound foundation for their future studies.
第1题
预裂爆破的起爆顺序为()
①周边眼 掏槽眼 辅助眼 底板眼
②周边眼 辅助眼 掏槽眼 底板眼
③掏槽眼 辅助眼 周边眼 底板眼
④掏槽眼 周边眼 辅助眼 底板眼
第2题
光面爆破起眼的顺序应该为___________。
A.周边眼、辅助眼、掏槽眼
B.掏槽眼、周边眼、辅助眼
C.掏槽眼、辅助眼、周边眼
D.辅助眼、周边眼、掏槽眼
第3题
隧道爆破施工时,光面爆破中炮眼的起爆顺序是()。
A.周边眼→辅助眼→掏槽眼
B.掏槽眼→辅助眼→周边眼
C.辅助眼→掏槽眼→周边眼
D.辅助眼→周边眼→掏槽眼
第4题
关于钻眼爆破的掏槽眼,说法正确的是()。
A. 巷道不允许采用直眼掏槽方法
B. 掏槽眼的布置和工作面的岩性无关
C. 掏槽眼应以掘进断面中心为中心
D. 掏槽眼的深度一般要比其他炮眼深0.2~0.3m
第6题
掘进工作面炮眼爆破顺序为()。
A.掏槽眼-辅助眼-周边眼
B.掏槽眼-周边眼-辅助眼
C.辅助眼-掏槽眼-周边眼
D.周边眼-辅助眼-掏槽眼
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