【判断题】指令系统体现了机器的属性,这是属于计算机组成的问题。
【多选题】下列( )属于内分泌系统的存在形式。
A.
独立的内分泌腺,如垂体、甲状腺、甲状旁腺、肾上腺、松果体等。
B.
附属于某些器官中的内分泌细胞群,如附属于胰腺的胰岛,附属于卵巢的黄体,附属于睾丸的睾丸间质细胞等。
D.
兼有内分泌功能的细胞,如心肌细胞能分泌心纳素,巨噬细胞能分泌干扰素,肥大细胞能分泌组胺和5-羟色胺等。
【单选题】Which statement is true according to the passage?
A.
Mr. Johnson's car stood on its boot as it fell down.
B.
Mr. Johnson could not escape from the door because it was full of sweet jam.
C.
Mr. Johnson's car accident was partly due to the slippery road.
D.
Mr. Johnson struggled in the pouring mud as he unscrewed the back seat.
【单选题】从学前教育的历史发展来看,()年代,学前教育以发展儿童的智力为中心
【简答题】Why was the band Beatles so popular in America?