(答案不唯一)1是1的倒数;
34:27=34×28:27×28.
故答案为:1,1;28,28.
It's nearly time for class to start. The teacher _____ be here soon. [ ]
A. can
B. should
C. shall
D. need
现代药房管理的核心是
A.保证合理用药B.用药的安全C.保证用药及时D.药品的有效性E.药品的经济性