A:若图中①为某种多聚体的单体,则①最可能是氨基酸
B:若②存在于皮下和内脏器官周围等部位,则②可能是脂肪
C:若④主要在人体肝脏和肌肉内合成,则④最可能是糖原
D:若③为多聚体,且能贮存生物的遗传信息,则③是染色体
古诗中有“大漠孤烟直,长河落日圆”的壮美诗句, 诗人看到的落日并非太阳的实际位置,而是光线经过不均匀的大气层时发生了____而形成的像,太阳的实际位置在图中的____。(填“甲”或“乙”)、若没有大气层,则,日出时间将____(填“提前”或“推迟”), 日落时间将____填(“提前”或“推迟”),白天时间将变____(填“短”或 “长”)。
This is a picture of Mr. Green's family. 1 the picture we can see Mr. green, Mrs. Green, their son Jim 2 their daughter Susan. Mr. Green is3 in a chair. He is 4 a newspaper. Mrs. Green 5 some housework. Jim is a Middle School student. He is reading a book near the window. Look at 6 , she is playing with her toys 7 the floor. She is Mr. Green and Mrs. Green's daughter, Susan. 8 that behind Susan? It's a 9. What's the cat doing? It's playing 10 a ball.
同一个单摆每摆动一次所需要的时间是相同的。根据 ____ ,人们制作了摆钟。
下列是对古代希腊雅典城邦的叙述,其中不正确的是( )
图中的MP、NP为晨昏线.阴影所在的经度范围与全球其他地区日期不同,读图,回答下题.