11.下列计算正确的是( )
0 283468 283476 283482 283486 283492 283494 283498 283504 283506 283512 283518 283522 283524 283528 283534 283536 283542 283546 283548 283552 283554 283558 283560 283562 283563 283564 283566 283567 283568 283570 283572 283576 283578 283582 283584 283588 283594 283596 283602 283606 283608 283612 283618 283624 283626 283632 283636 283638 283644 283648 283654 283662 366461
| A. | 2-1=-2 | B. | 20=0 | C. | (a3)2=a6 | D. | 2a+3a=6a |