植物果实内的种子数目取决于( ) A . 子房内胚珠的数目 B . 子房内花粉的数目 C . 受精极核的数目 D . 花粉里精子的数目 答案:A( ) 2. ― ―_____________you play the guitar at the age of 11? —Yes ? I could. I believe I will _____________play better in the future.A. Can ; be able toB. Could;be able toC. Were able to;couldD. Could;could