【单选题】Many children have formed the habit of reading but _____ notes meanwhile. [ ]
【单选题】位于生产可能性曲线以内的任何一点表示( )
【简答题】酶活性指在规定条件下单位时间 内( )或( ) 。酶活性单位是指一定条件下使酶促反应达到某一速度时所需要 的( ) 。
【单选题】In many places in China, the old over 90 not only by their family but also by the government.
B.
are taken good care of
C.
is taking good care of
【单选题】近代中国的性质和中国革命的历史任务决定了中国革命的性质是( )