A:有较长的寿命
B:可产生较大量的子代
C:有较长的生长周期
D:可产生大量的可遗传变异
We should urge people _______ riding in cars.
Well ____ (保养维护), the second- hand car is still in good condition.
1+3=____
5-4=____
gǔ ròu
hǎi xiá
huā dēng
jié rì
yuán yuè
qián cái
____