—Does he know how to work out the proble
题型：选择题
问题：
—Does he know how to work out the problem ?
—Yes , he has a good idea to solve it .
A．caught up with
B．kept up with
C．come up with
D．put up with
题型：选择题
根据下列实验现象，所得结论错误的是
| 实验 | 实验现象 | 结论 |
| A | Ⅰ烧杯中铁片表面有气泡，Ⅱ烧杯中铜片表面有气泡 | 活动性：Al＞Fe＞Cu |
| B | 试管中收集到无色气体 | 铜与浓硝酸反应产物是NO |
| C | 试管b比试管a中溶液的红色深 | 增大反应物浓度，平衡向正反应方向移动 |
| D | 长颈漏斗内液面高于烧瓶内液面且保持不变 | 装置气密性良好 |