【单选题】In a bag of 400 jelly beans, 25% of the jelly beans are red in color. If you randomly pick a jelly bean from thebag, what is the probability that the jelly bean pickedis NOT one of the red jelly beans...
【简答题】In the supermarket you would also find many frozen foods --- frozen fruits, vegetables, meat and fish. As techniques for 5.__________ (freeze) food are being improved, more frozen foods are appearing ...