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【简答题】
Homework has never been terribly popular with students and even many parents, but in recent years it has been particularly scorned. School districts across the country, most recently Los Angles Unified, are revising their thinking on his educational ritual. Unfortunately, L. A. Unified has produced an inflexible policy which mandates that with the exception of some advanced courses, homework may no longer count for more than 10% of a student’s academic grade. This rule is meant to address the difficulty that students from impoverished or chaotic homes might have in completing their homework. But the policy is unclear and contradictory. Certainly, no homework should be assigned that students cannot complete on their own or that they cannot do without expensive equipment. But if the district is essentially giving a pass to students who do not do their homework because of complicated family lives, it is going riskily close to the implication that standards need to be lowered for poor children. District administrators say that homework will still be a part of schooling; teachers are allowed to assign as much of it as they want. But with homework counting for no more than 10%of their grades, students can easily skip half their homework and see very little difference on their report cards. Some students might do well on state tests without completing their homework, but what about the students who performed well on the tests and did their homework? It is quite possible that the homework helped. Yet rather than empowering teachers to find what works best for their students, the policy imposes a flat, across-the-board rule. At the same time, the policy addresses none of the truly thorny questions about homework. If the district finds homework to be unimportant to its students’ academic achievement, it should move to reduce or eliminate the assignments, not make them count for almost nothing. Conversely, if homework matters, it should account for a significant portion of the grade. Meanwhile, this policy does nothing to ensure that the homework students receive is meaningful or appropriate to their age and the subject, or that teachers are not assigning more than they are willing to review and correct. The homework rules should be put on hold while the school board, which is responsible for setting educational policy, looks into the matter and conducts public hearings. It is not too late for L. A. Unified to do homework right.
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【单选题】急性肾小球肾炎患儿水肿最先发生的部位是
A.
眼睑
B.
腹部
C.
腰部
D.
阴囊
E.
下肢
【单选题】裂孔性视网膜脱离指的是
A.
视网膜神经上皮层与色素上皮层的分离
B.
视网膜色素上皮层与脉络膜的分离
C.
视网膜内五层与外五层之间的分离
D.
视网膜内九层内的板层分裂
E.
视网膜神经纤维层与节细胞层之间的分离
【多选题】以下关于IPv6地址1A22:120D:0000:0000:72A2:0000:0000:00C0的表示中,正确的是()。
A.
1A22:120D::72A2:0000:0000:00C0
B.
1A22:120D::72A2:0:0:C0
C.
1A22:120D:0:0:72A2::C0
D.
1A22:120D::72A2::00C0
【判断题】机队规划的目的是为航空运输提供与需求相匹配的运力。
A.
正确
B.
错误
【单选题】以下关于IPV6地址1A22:120D:0000:0000:72A2:0000:0000:00C0的表示中,错误的是()
A.
1A22:120D::72A2:0000:0000:00C0
B.
1A22:120D::72A2:0:0:C0
C.
1A22::120D::0:72A2:00C0
D.
1A22:120D:0:0:72A2::C0
【判断题】视网膜脱离是指视网膜色素上皮层和视网膜神经感觉层之间的分离。
A.
正确
B.
错误
【简答题】养成网络自律精神 具体怎么办,同学们说说看。
【判断题】视网膜脱离指的是视网膜神经上皮层和色素上皮层之间的分离。
A.
正确
B.
错误
【多选题】凯氏定氮法中蒸馏消化液,关于加入氢氧化钠溶液的说法正确的有
A.
形成碱性环境
B.
加热条件下,促使消化液释放出氨气
C.
氢氧化钠溶液浓度越大越好
D.
中和盐酸的作用
【多选题】关于消化液的说法,正确的有
A.
人体每天分泌的消化液达6-8L
B.
可以稀释食物
C.
可以改变消化道内的PH,适应消化酶活性的需要
D.
可以分泌黏液,保护消化道黏膜
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