A:“三亲试管婴儿”培育方式属于有性生殖
B:早期胚胎发育所需的营养物质主要来自于捐献者卵细胞的细胞质
C:早期胚胎需植入母体子宫内继续发育
D:“三亲试管婴儿”的遗传物质全部来自母亲卵细胞的细胞核
关于我国南北方农业的叙述,正确的是( )
支撑信心最重要的杠杆是( )
下列给出的现象中,物体运动状态没有发生改变的是( )
____ ____ ____ ____your brother at home.
These are Cara and Ben. They are twins (双胞胎). They are twelve. This is their bedroom. It's a nice room. There are two beds in the room. The yellow bed is Cara's and that green one is Ben's. The twins have one desk and two chairs. The chairs look the same. Cara's sweater is on his bed. Ben's coat is on his chair. Their clock, books and pencil-boxes are on the desk. Their schoolbags are behind the chairs.