一般认为，陶器是随着史前人类进入（）时代的定居生活而出现的。
参考答案：新石器
结核菌素试验72小时注射部位出现红肿硬结直径20mm并出现水疱、坏死，判断结果是（）
A.“-”
B.“±”
C.“+”
D.“++”
E.“+++”
The relatives of the passengers in the missing Flight MH370 cann’t hide their feelings, _____ they can make sure that the plane will make a safe landing on the airport.
A．except when
B．except
C．except that
D．except where
