【简答题】We couldn't help when we heard the news that we were going to have a three-day holiday.
【判断题】DNA 半不连续复制是复制时一条链的合成方向是 5′→3′ ,而另一条链的合成方向是 3′→5′ 。( )
【判断题】DNA 半不连续复制是指复制时一条链的合成方向是 5’→3’ ,另一条链的合成方向为 3’ →5’
【判断题】DNA半不连续复制是复制时一条链的合成方向是5’—3’,另一条则是3’—5’。
【单选题】吊钩角由两根绳构成,两根绳上分别产生拉力。两根分绳的角度取决于负载的重量,重量增加角度加大,无论任何提升过程,吊钩角度不得超过:
【判断题】DNA半不连续复制是指复制时一条链的合成方向是5'→3',而另一条链的合成方向为3'→5'。( )
【单选题】We couldn't read the notice on the board because several people were standing______it.
【单选题】your help, we couldn't complete the work in time, I am afraid.
【单选题】We couldn't find the foreign boy anywhere. He____.