读一读,选一选。( ) 1. If you like helping peopl 发布时间:2017-04-02 23:01 │ 来源:www.tikuol.com 题型:选择题 问题: 读一读,选一选。( ) 1. If you like helping people. You'll be a policeman. A. ( ) 2. If you like Chinese. You'll be a writer.B. ( ) 3. If you like singing. You'll be a singer.C. ( ) 4. If you like drawing. You'll be an artist. D. ( ) 5. If you like drawing and math. You'll be an engineer. E.
题型:选择题 在数列{an}中,a1=1,且Sn,Sn+1,2S1成等差数列(Sn表示数列{an}的前n项和),则S2,S3,S4分别为__________________,猜想Sn=________. 查看答案
题型:选择题 H.Selye认为,对机体有害的各种应激源,可引起以什么为主的非特异性反应()。A.交感神经-肾上腺髓质轴B.下丘脑-垂体-肾上腺皮质轴C.下丘脑-垂体-甲状腺轴D.下丘脑-垂体-性腺轴E.下丘脑-垂体后叶轴 查看答案