生物的亲子间和子代个体间的相似性叫做____;亲子间或子代个体间的差异叫做____.这两种现象是生物界普遍存在的现象,它们是通过____和____而实现的.
一元二次方程x2-x+14=0的根( )
818×15= ____
316×20= ____
In yesterday's business training course the consultant instructed us that a good salesman must be ______ if he wants to succeed.
Name
Height(cm)
Weight(kg)
Place to live
Places around home
Hobbies
Things to do at the weekend
Ann
150
38
city
shops, a cinema, a library
reading
read books, see a film
Sue
145
40
countryside
hills, rivers,
trees
riding,
running
run with her dad