丁二烯产品中水值分析方法采用()分析方法。
A、库仑法
B、色谱法
C、比重法
D、密度法
参考答案:A
As can be seen, modern cell phones are ______ phones. They're used as cameras and computers too. [ ]
A. less than
B. more than
C. no more than
D. not more than
承德县加快文化事业发展,投资1000多万元建成农家书屋()个。
A、23
B、24
C、378
D、401