【简答题】用所给动词的适当形式填空 1. We (paint) the house before we (move) in. 2. That rich old man (make) a will before he (die). 3. They (study) the map of the country before they (leave). 4. The robbers (run away) befo...
【简答题】用所给动词的适当形式填空。 1. I believe your dream (come) true soon. 2. We should do everything we can (solve) the problem. 3. Unluckily, he (break) down from the hard work. 4. Over the past years, great changes (...
【单选题】叶绿素 a 和叶绿素 b 对可见的吸收峰主要是在
【单选题】叶绿素a和叶绿素b对可见的吸收峰主要是在( )。