6.某小学组织六年级学生到郊外春游.如果每辆汽车坐40人,则有5人没有上车;如果每辆汽车坐48人,则空出一辆汽车,并且其中有一辆车还可以再坐11人.现假设共有x个学生,y辆汽车,则可列出的方程组为( )
| A. | $\left\{\begin{array}{l}{40x+5=y}\\{48x-59=y}\end{array}\right.$ | B. | $\left\{\begin{array}{l}{40y+5=x}\\{48(y-1)=x-11}\end{array}\right.$ | ||
| C. | $\left\{\begin{array}{l}{40y+5=x}\\{48y-11=x}\end{array}\right.$ | D. | $\left\{\begin{array}{l}{40y=x-5}\\{48(y-1)=x+11}\end{array}\right.$ |
5.
如图,数轴上标有A,B,C,D四个点,其中与表示5-$\sqrt{30}$的点最接近的是( )
| A. | 点A | B. | 点B | C. | 点C | D. | 点D |
4.若关于x的方程5x-2a=8的解是非正数,则a的取值范围是( )
| A. | a>-4 | B. | a<-4 | C. | a≥-4 | D. | a≤-4 |
3.16的平方根是( )
| A. | ±4 | B. | 4 | C. | -4 | D. | $\sqrt{16}$ |
2.
如图,AB∥CD,∠A=70°,则∠1的度数是( )
| A. | 130° | B. | 110° | C. | 100° | D. | 70° |
1.下列四个图形中,∠1与∠2是对顶角的是( )
0 296388 296396 296402 296406 296412 296414 296418 296424 296426 296432 296438 296442 296444 296448 296454 296456 296462 296466 296468 296472 296474 296478 296480 296482 296483 296484 296486 296487 296488 296490 296492 296496 296498 296502 296504 296508 296514 296516 296522 296526 296528 296532 296538 296544 296546 296552 296556 296558 296564 296568 296574 296582 366461
| A. | B. | C. | D. |