题目内容

下列属于行楷书人字头的书写要点有

A. 斜撇斜捺笔锋收笔
B. 回锋撇
C. 撇要直
D. 捺一般写成顿笔收笔的长顿点

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科学故事DNA双螺旋的案例中,下面哪个选项对应“数据-信息-知识-理解”中的“理解”这一层次

A. 沃森与克里克提出了DNA双螺旋结构理论
B. 富兰克林拍摄的x射线衍射图
C. 沃森与克里克判断DNA并非以往猜想的三链结构
DNA双螺旋结构下的遗传信息传递机制和对遗传性的解释

请再次阅读关于前面读过的“naked mole rat”学术短文,‎并从中选出哪句话作者在阐述自己论文贡献的“新的理解”The naked mole rat (Heterocephalus glaber) displays exceptional longevity, with a maximum lifespan exceeding 30 years. This is the longest reported lifespan for a rodent species and is especially striking considering the small body mass of the naked mole rat. In comparison, a similarly sized house mouse has a maximum lifespan of 4 years. In addition to their longevity, naked mole rats show an unusual resistance to cancer. Multi-year observations of large naked mole-rat colonies did not detect a single incidence of cancer. Here we identify a mechanism responsible for the naked mole rat’s cancer resistance. We found that naked mole-rat fibroblasts secrete extremely high-molecular-mass hyaluronan (HA), which is over five times larger than human or mouse HA. This high-molecular-mass HA accumulates abundantly in naked mole-rat tissues owing to the decreased activity of HA-degrading enzymes and a unique sequence of hyaluronan synthase 2 (HAS2). ... We speculate that naked mole rats have evolved a higher concentration of HA in the skin to provide skin elasticity needed for life in underground tunnels. This trait may have then been co-opted to provide cancer resistance and longevity to this species.

A. This trait may have then been co-opted to provide cancer resistance and longevity to this species.
B. This high-molecular-mass HA accumulates abundantly in naked mole-rat tissues owing to the decreased activity of HA-degrading enzymes and a unique sequence of hyaluronan synthase 2 (HAS2).
C. We found that naked mole-rat fibroblasts secrete extremely high-molecular-mass hyaluronan (HA), which is over five times larger than human or mouse HA.
D. We speculate that naked mole rats have evolved a higher concentration of HA in the skin to provide skin elasticity needed for life in underground tunnels.

According to the description listed below, choose the right readers.* Read the methods section and anything else that helps them finding a solution;* Big knowledge gap;‏* Possibly readers from a different area, looking for a method that can be used in their area;‏* Looking for clear introduction with many references.

A. The solution seeker
B. The young researcher
C. The field intelligence gatherer
D. The competitor

According to the description listed below, choose the right readers.* Does not need to be provided with any background;* Checks if you have cited their paper;‎* May use your references to complete their own;‎* May even have reviewed your paper.‎

A. The young researcher
B. The solution seeker
C. The competitor
D. The field intelligence gatherer

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