If you can’t read the new words, you may __ in the dictionary.

A．look it up

B．look up it

C．look them up

D．look up them

患者从事每天日常活动即出现心悸、气短症状，休息后即缓解。其心功能分级应为

A．心功能Ⅰ级

B．心能Ⅱ级

C．心功能Ⅲ级

D．心功能Ⅳ级

E．心功能Ⅴ级