要()保教管理人员。
A.加强培训
B.悉心调教
C.合理调配
D.加强教育
参考答案:C
Today we have chat rooms, text messaging, emailing… but we seem ________the art of communicating face-to-face.
A.Losing
B.to be losing
C.to be lost
D.having lost
细胞内液与组织液通常具有相同的
A.Na+浓度B.渗透压C.K+浓度D.胶体渗透压E.Ca2+浓度