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【单选题】
生殖器疱疹是由哪种病原体引起的：A.
HPV
B.
HBV
C.
CMV
D.
HSV
E.
HIV
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举一反三
【单选题】---- I’m sorry I stepped outside for a smoke. I was very tired. ---- There is no _____ for this while you are on duty.
A.
reason
B.
excuse
C.
cause
D.
explanation
【简答题】109分配阀最主要是由主阀部、（）和（）等三部分组成。
【单选题】—I'm very tired. —We really should stop ______ and go to bed.
A.
to study
B.
from studying
C.
studying
D.
of studying
【单选题】--- Hi, Tracy, you look tired. --- I’m very tired. I ____ the living room all day.
A.
painted
B.
had painted
C.
am painting
D.
have been painting
【简答题】ohn and I________ friends for eight years. Wefirst got to know each other at a Christmas party. But we_______ each other a couple of times before that. A. had been haveseen B have bee...
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