10以内的质数有______,它们的和是______.
10以内的质数有:2、3、5、7.
2+3+5+7=17;
故答案为:2、3、5、7;17.
The system has been designed to give students quick and easy ________ to the digital resources
of the library.[ ]
A. access
B. passage
C. way
D. approach
淘气从13:50到学校,也就是下午______时______分.16:50放学回家,下午他一共待在学校为______分钟.