题目

基因型为AaBb的个体产生的配子是（ ） A． 精子：A 、a、B 、b                    B． 精子：Aa、Bb C． 精子：AB 、aB 、Ab、ab             D． 精子：A 、b 答案：CThe Westwood Middle School has decided to hold a blood drive (献血活动), and you can help.Help with The Blood DriveThe School is holding a blood drive for teachers, parents, and town people. We need everyone’s help to make it a success. That includes you![来源: We need to collect 50 units of blood. That means 65 people are needed to come to the drive.How You Can HelpPick up information brochures (小册子) in the school office. Pass them out to your parents, teachers and any person who is healthy and at least 17 years old.When and Where to GoThe blood drive will take place on Tuesday, October 21, from 3:00 to 6:00 pm, in the school canteen.1. How many people are needed for the blood drive?A. 50.B. 65. C. 17. D. 21.2.Students can pick up information brochures ____.A. in the school officeB. at the school gateC. in the school canteenD. on the school playground3.When will the blood drive take place?A. On September 20.B. On September 21.C. On October 20. D. On October 21.