一期梅毒的主要表现为()
A.疳疮(硬下疳)
B.杨梅疮
C.横痃
D.小儿遗毒(胎传梅毒)
E.杨梅结毒
参考答案:A
Bill suggested ______ a meeting on what to do for the Shanghai Expo during the vacation.
A.having held
B.to hold
C.holding
D.hold
浸泡并软化印模膏的水温为( )。
A.0℃
B.室温
C.50℃
D.70℃
E.90℃