流式细胞仪中的鞘液和样品流在喷嘴附近组成一个圆形流束，自喷嘴的圆形孔喷出，与水平方向
题型：单项选择题
问题：
流式细胞仪中的鞘液和样品流在喷嘴附近组成一个圆形流束，自喷嘴的圆形孔喷出，与水平方向的激光束垂直相交，相交点称为（）。
A.敏感区
B.测量区
C.激光区
D.计算区
E.观察区
题型：单项选择题
| 看图选择正确的单词填空。 | |
 . He is a ____________  . Every day he goes to work ____________ ____________  . He likes ____________  . He is a writer, too. My mother likes singing. She is a ____________  . She goes to work ____________ ____________  . And I like painting, but I don't want to be an ____________  . I'm going to be a ____________  . |