根据句子意思，用括号中所给汉语提示或英语单词的适当形式填空。(每空一词)
①The____  of this mountain is 5540 meters. (高度)
②If you want to come, please let us know as soon as ____ (可能的).
③There are ____ of people by the sea. (千)
④The more careful you are, the fewer ____  you'll make. (错误)
⑤Mum is always busy. Last week she ____  three meetings. (出席)
⑥This piece of advice is very____ . I'll take it. (use).
⑦Bad weather sometimes causes____  (nature) disasters.
⑧____ , I could get the last plane ticket to the USA. (luck)
⑨The twin brothers like keeping secrets to ____ . (they)
⑩The radio says it will be much____ (rain) tomorrow.

今年5月11日，某同学发现虫蛀过的绿豆有些能发芽，有些不能发芽，便产生了探究的想法．他将30粒正常绿豆种子均分为三组，其中一组不作处理，其余两组进行不同部位的钻孔处理（钻孔不影响未处理部分的结构），将三组种子置于相同且适宜的环境中培养，实验结果如下表：（图甲为绿豆种子，图乙为种子内部结构）

（1）对比三组实验结果可知，缺失　    　（填种子结构名称）会导致种子无法发育成幼苗．

（2）比较第一和第三组实验可知，第三组种子还能萌发成幼苗，这是因为　    　，从种子萌发速度看，破损的种子更快，因为种皮破损的种子更有利于吸收　　。破损的种子在自然环境中的出苗率是否更高？该同学又开始了新的探究…