排卵期宫颈粘液为（）
A.卵圆体
B.不典型结晶
C.羊齿状
D.梭形
E.树枝状
参考答案：C
When he learned that his brother had returned from abroad, he set off to his home _____. Which
of the following is not OK? [ ]
A. immediately
B. right away
C. right then
D. right now
E. at once
声音：音乐
A．语言：词语
B．水流：空气
C．树木：大地
D．鸡蛋：母鸡
