怀孕好比一粒“种子”植入土壤中，种植到子宫内膜的“种子”是(

怀孕好比一粒“种子”植入土壤中，种植到子宫内膜的“种子”是( )

A.卵细胞 B.胚泡 C.胚胎 D.受精卵

答案

相关题目

For as long as I can remember, I have been very bad at arguing with p

For as long as I can remember, I have been very bad at arguing with people. As soon as someone disagrees with me, I get angry because I feel attacked, like the other person is out to show t

Ｉ want to _______ a question to the chairman but in a moment I lost my nerveA.

Ｉ want to _______ a question to the chairman but in a moment I lost my nerveA. ask B. reply C. rise D. raise

—Who has made a mess in my room? —Who else it but y

—Who has made a mess in my room? —Who else it but your naughty son? A．could do B．could have done C．should do D．should have done

质量不计的直角形支架两端分别连接质量为和的小球A和B。支

质量不计的直角形支架两端分别连接质量为和的小球A和B。支架的两直角边长度分别为和，支架可绕固定轴O在竖直平面内无摩擦转动，如图所示。开始

We had learned two thousand English words the end of

We had learned two thousand English words the end of last month. A. until B. in C. by D

阅读短文，回答问题人之为学，不日进则日退。独学无友，

阅读短文，回答问题人之为学，不日进则日退。独学无友，则孤陋①而难成。久处一方，则习染而不自觉。不幸而在穷僻之域，无车马之资②，犹当博

目前对地球形状的精确研究主要是基于 A.遥感技术和地理信

目前对地球形状的精确研究主要是基于 A.遥感技术和地理信息系统 B.全球定位系统和地理信息系统 C.遥感技术和全球定位系统 D.数字地球

起重机的钢索将重物由地面沿竖直方向吊起到空中某个高度

起重机的钢索将重物由地面沿竖直方向吊起到空中某个高度，其速度一时间图象如图甲所示，则钢索对重物的拉力的功率随时间变化的图像可能是图乙

怀孕好比一粒“种子”植入土壤中，种植到子宫内膜的“种子”是(

答案

相关题目

最新题目