Who's _____ your brother or your sister? [ ]
A. busy
B. busier
C. busyer
D. the busier
答案:B
With thick snow _____ the ground, our city looks more beautiful. [ ]
A. covers
B. covering
C. covered
D. to cover
妊娠合并肝功能异常的患者,施行麻醉过程中,应避免使用的麻醉药物是()。
A.氟烷
B.异氟烷
C.阿曲库铵
D.琥珀酰胆碱
E.硫喷妥钠