用纯种的黄色圆粒豌豆与绿色皱粒豌豆杂交，F1全部是黄色圆粒，F1_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

用纯种的黄色圆粒豌豆与绿色皱粒豌豆杂交，F₁全部是黄色圆粒，F₁自交的F₂，在F中杂合的绿色圆粒有4000个，推测纯合的黄色皱粒有（）

A.2000个

B.4000个

C.6000个

D.8000个

答案

参考答案：A

补全对话，情景问答

读一读，补全对话。

shirt sweater T-shirt jacket

1. A: It's cold today. You can't wear your ___________.
     B: I can wear my __________.
2. A: It's warm today.
    B: I can wear my __________.
    A: You can wear your ________, too.
3. A: It's hot today.
    B: I can wear my______!
    B: Yes, you can.

单项选择题

以下穴位中，不是由两个穴点组成的是

A．二白

B．膝眼

C．四缝

D．腰痛点

E．三角灸