—Will you go to the picnic tomorrow? —Notmy dear dog is allowed to accompany me. A . if B . until C . unless D . when 答案:C科技小组的同学们做了三次玉米种子发芽试验,实验情况如下表:项目数量次数种子总数发芽种子数发芽率第一次5048 96%第二次10090 90%第三次150138 92%那么,计算这批玉米种子的发芽率的正确列式是( )
A、(96%+90%+92%)÷3B、48+90+13850+100+150×100%C、48+90+13850+100+150÷3×100%D、应该用92%表示