Internet__is often a problem, especially in rural areas()
A. expressions
B. readability
C. replication
D. connectivity
Our strong sense of national______has been shaped by our history()
A. measure
B. identity
C. collaboration
D. establishment
正常情况下,心率应当是()次/分
A. 60-80
B. 80-100
C. 60-100
D. 80-120
E. 100-120
He has a unique ability to___ any sound he has heard()
A. imitate
B. establish
C. participate
D. reveal