辐通量是光通量的()倍。A.683 B.1/683 C.863 D.1/863 发布时间:2017-10-25 14:29 │ 来源:www.tikuol.com 题型:单项选择题 问题: 辐通量是光通量的()倍。A.683B.1/683C.863D.1/863
题型:单项选择题 从Ⅱ栏中选出与 I 栏问句相对应的答句,将其序号写在题前的括号内。Ⅰ( )1. Did you have fun in Beijing? ( )2. How did you go to Shenzhen? ( )3. What did she do on the farm? ( )4. Do you want to write an e-mail?( )5. Where did you go? ⅡA. To the Palace Museum. B. Yes, we did. C. I went by plane. D. Yes, I do. E. She planted some trees. 查看答案
题型:单项选择题 读极地地区图,回答问题。(10分)(1)判断下列字母所表示的大洲、大洋名称:A为________洲,B为________洋。C为________站(科学考察站)。(2)根据图中哪些信息可以区分北极地区和南极地区?(3)我国科学考察队去南极考察一般选择在11—12月抵达南极洲,其主要原因是 。(4)科学考察队需要克服的恶劣气候是______________。(5)两个极地地区相比较,哪个地区更寒冷? 查看答案