DNA复制是指以亲代DNA为模板合成子代DNA的过程。参与该过程的物质是( )①DNA ②DNA聚合酶 ③脱氧核苷酸 ④mRNA ⑤tRNA
A:①②③
B:①②④
C:②③⑤
D:②④⑤
A. I'd like some carrots and fish.
B. I'd like some juice and chicken.
C. I'd like some rice and vegetables.
D. I'd like some beef and bread.
在“测量定值电阻阻值”和“测量小灯泡电功率”的实验中:
16=____×____