A:不含不同基因
B:产生的配子基因组成只有一种
C:自交后代性状能稳定遗传
D:由基因组成相同的雌雄配子结合并发育而来
在Rt△ABC中,∠C=90°,如果AB=6,cosA=23,那么AC=____
Read and choose为图画选择相应的文字描述。
A. There are five people in the picture.
B. The shirt isn't Zhang Peng's . It's Mike's.
C. These are horses.
D. It's rainy today. I can open up my umbrella.
E. The shoes are Wu Yifan's.
____