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问题:

秋江送别

[唐]王勃归舟归骑俨成行,江南江北互相望。谁谓波澜才一水,已觉山川是两乡。送柴侍御[唐]王昌龄沅水通波接武冈,送君不觉有离伤。青山一道同云雨,明月何曾是两乡?19.这两首送别诗在情感上,《秋江送别》突出________;而《送柴侍御》突出________,与王勃《送杜少府之任蜀川》中的“海内存知己,...

问题:

I am an active playgoer and play-reader,and perhaps my best reason for editing this book is a hope o

Each play has a theme or central idea which the playwright(剧作家)hopes to get across through dialogue and action. A few characters are used to create a ...

问题:

The traffic signals along Factoria Boulevard in Bellevue,Washington,generally don’t flash the same l

That is by design. Bellevue,a fast-growing city,just east of Seattle,uses a system that is gaining popularity around the US:intersection(十字路口)signals ...

问题:

氟利昂大量逸散到大气层中会直接导致( )

A.臭氧层破坏B.酸雨形成C.水体污染D.温室效应

问题:

下列关于生物体中有机物的叙述,正确的是( )

A.淀粉的结构单元是蔗糖B.胆固醇是人体所需的物质C.蛋白质是生物体内重要的贮能物质D.人细胞中储存遗传信息的物质是RNA

问题:

溶酶体是内含多种酸性水解酶的细胞器。下列叙述错误的是( )

A.高尔基体断裂后的囊泡结构可形成溶酶体B.中性粒细胞吞入的细菌可被溶酶体中的多种酶降解C.溶酶体是由脂双层构成的内、外两层膜包被的小泡D.大量碱性物质进入溶酶体可使溶酶体中酶的活性发生改变

问题:

对人群免疫接种是预防传染性疾病的重要措施。下列叙述错误的是( )

A.注射某种流感疫苗后不会感染各种流感病毒B.接种脊髓灰质炎疫苗可产生针对脊髓灰质炎病毒的抗体C.接种破伤风疫苗比注射抗破伤风血清可获得更长时间的免疫力D.感染过新型冠状病毒且已完全恢复者的血清可用于治疗新冠肺炎患者

问题:

Challenging work that requires lots of analytical thinking,planning and other managerial skills migh

Researchers from the University of Leipzig in Germany gathered more than 1,000 retired workers who were over age 75 and assessed the volunteers’ memor...

问题:

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

I experienced years of loneliness as a child. 31 His friends teased him about babysitting his sister and his interests were far different from mine. W...

问题:

I’ve been farming sheep on a hillside for 54 years. I use a small tractor to get about. My dog Don a

One morning l 36 a lost lamb when I was in the top field,near where a motorway cuts through my land. ’The lamb had become separated from its 37 ,so I ...

问题:

阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

Some time after 10,000 BC,people made the first real attempt to control the world they lived 56 ,through agriculture. Over thousands of years,they beg...

问题:

下列关于细胞的需氧呼吸与厌氧呼吸的叙述,正确的是( )

A.细胞的厌氧呼吸产生的ATP比需氧呼吸的多B.细胞的厌氧呼吸在细胞溶胶和线粒体嵴上进行C.细胞的需氧呼吸与厌氧呼吸过程中都会产生丙酮酸D.若适当提高苹果果实贮藏环境中的O2浓度会增加酒精的生成量

问题:

下列与细胞生命活动有关的叙述,正确的是( )

A.癌细胞表面粘连蛋白增加,使其容易在组织间自由转移B.高等动物衰老细胞的线粒体体积随年龄增大而减小,呼吸变慢C.高等植物胚胎发育过程中,胚柄的退化是通过编程性细胞死亡实现的D.愈伤组织再分化形成多种类型的细胞,这些细胞中mRNA的种类和数量相同

问题:

高等动物胚胎干细胞分裂过程中,发生在同一时期的是( )

A.核糖体的增生和环沟的形成B.染色体的出现和纺锤体的出现C.染色单体的形成和着丝粒的分裂D.中心体的复制和染色体组数的加倍