问题
选择题
She must be looking forward as much to his retum as he himself is to_______her.[ ]
A. see
B. have seen
C. seeing
D. be seeing
答案
答案：C
搜题请搜索小程序“爱下问搜题”
She must be looking forward as much to his retum as he himself is to_______her.[ ]
A. see
B. have seen
C. seeing
D. be seeing
答案：C
某化学课外活动小组设计实验验证某管道煤气的成分．首先将混合气体通过足量的生石灰和固体烧碱的混合物，除去其中CO2和水蒸气，接着进行了以下实验．请根据其实验的推断结果，填写实验步骤和实验现象．
| 实验步骤 | 实验现象 | 推断结果 |
| （1）______ | ______ | 可能含有H2、CO中的一种或两种 |
| （2）______ | ______ | 肯定含有H2 |
| （3）______ | ______ | 肯定含有CO |
