“二战”后，日本远洋捕捞业迅速发展的原因是 ( )
– We can use GPS to help us find the right way.– Really? Will you show me it?
关于天然放射线性质的说法正确的是（ ）
— Cloning can lead to many complicated problems.
— __________. That's why a lot of people are strongly against it.
