问题
选择题
Mary thought highly of the painting,but to Mr Smith's ________ eye,the painting was terrible.[ ]
A. eager
B. extra
C. exact
D. expert
答案
答案：D
搜题请搜索小程序“爱下问搜题”
Mary thought highly of the painting,but to Mr Smith's ________ eye,the painting was terrible.[ ]
A. eager
B. extra
C. exact
D. expert
答案：D
某原电池装置中盛有浓KOH溶液，若分别向__________(填“正”或“负”，下同)极通入可燃性气体，向__________极通入O2，则电路中就有电流通过，电流方向由__________极流向__________极，溶液中OH－向__________极移动。试完成下列问题：
| 可燃性气体 | 正极反应 | 负极反应 | 电池总反应 | pH变化 | |
| (1) | H2 | ||||
| (2) | CO | ||||
| (3) | CH4 |