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【判断题】
兴国山歌起源于秦朝,兴盛于宋代,世代流传至今。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Many children have formed the habit of reading but _____ notes meanwhile. [ ]
A.
not take
B.
not to take
C.
not taking
D.
not taken
【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.
A.
is taking good care
B.
are taken good care of
C.
is taking good care of
D.
are taken good care
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