胚根突破种皮后，迅速伸长，形成根系，幼苗及早扎根和形成根系，

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问题填空题

胚根突破种皮后，迅速伸长，形成根系，幼苗及早扎根和形成根系，有利于_______和_______。

答案

吸收营养固定植物体

选择题

Hardly __________ dead or injured when the disaster hit the area.

A．had the Chinese citizens been reported

B．the Chinese citizens had been reported

C．did the Chinese citizens been reported

D．was the Chinese citizens been reported

问答题

盒中装着标有数字1，2，3，4的乒乓球各2个，从盒中任意取出3个球，求下列事件概率．
1.A={取出的3个球上最大的数字是4}．