哪些抗原可以诱发变态反应？
参考答案：
诱发变态反应的抗原称为变应原，可以是完全抗原或半抗原，也可以是外来抗原或受各种理化因素影响而发生改变的自身抗原。
Lucy’s new job paid twice as much as she had made in the restaurant.
A．working
B．work
C．to work
D．worked
方程（x+3）2=25的根是（ ）
A．5，-5
B．2，-2
C．8，2
D．-8，2
