A number dial lock has four dials. Each dial has 10 numbers from 0 to 9. How many four digit numbers can these four dials make up.( )
A: 4
B: 9999
C: 10000
D: 10
A: 4
B: 9999
C: 10000
D: 10
举一反三
- 智慧职教: How many elements has a standard number system? How many Numbers are there for each element?
- Each memo has four headings at the top, they are________. A: To B: From C: Date D: Subject
- A first-grade teacher use ten flash cards, numbered 1 through 10, to teach her students to order numbers correctly. She has students choose four flash cards randomly, then arrange the cards in ascending order. One day, she removes the cards numbered "2" and "4" from the deck of flash cards. On that day, how many different correct arrangements of four randomly selected cards are possible A: 70 B: 210 C: 336 D: 840 E: (E) 1,680
- It has four distinctive seasons and each has its own beauty.
- While the four countries share many customs, each has its own setof cultural nuances.