问题
选择题
_______ orange is orange, and _______ orange is a kind of drink. [ ]
A. An; /
B. /; an
C. /; /
D. An; an
答案
答案：A
搜题请搜索小程序“爱下问搜题”
_______ orange is orange, and _______ orange is a kind of drink. [ ]
A. An; /
B. /; an
C. /; /
D. An; an
答案：A
已知X、Y、Z、W均为中学化学中常见的单质或化合物，它们之间的转化关系如图所示(部分产物已略去)。则W、X不可能是
| 选项 | W | X |
| A | 盐酸 | Na2CO3溶液 |
| B | NaOH溶液 | AlCl3溶液 |
| C | CO2 | Ca(OH)2溶液 |
| D | Cl2 | Fe |