问题
选择题
The newspaper ______ it's going to rain today. |
A. say B. says C. sayed D. said |
答案
答案:B
The newspaper ______ it's going to rain today. |
A. say B. says C. sayed D. said |
答案:B
(8分)选择与“实验操作”相对应“实验现象”的字母,填入对应“答案”栏的空格中。
实验操作 | 答案 | 实验现象 |
(1)乙烯通入酸性高锰酸钾溶液中 | A.呈蓝色 B.紫色褪去 C.分层且上层颜色深下层颜色浅 D.变黄色 | |
(2)苯加入盛有Br2水的试管中 | ||
(3)向鸡蛋清中滴加少许浓硝酸 | ||
(4)向土豆片上滴加碘水 |