从病原体侵入机体到临床症状出现这段时间称为
A．传染期
B．潜伏期
C．隔离期
D．非传染期
E．恢复期
参考答案：B
Harry Potter lives and studies in a world _________ anything can happen, ______ attracts millions people.
A．where, which
B．to which, that
C．that, which
D．on which, that
His uncle is a worker and has been working in the factory for more than ten years. _____.
A．So is his aunt
B．So has his aunt
C．So his aunt does
D．So it is with his aunt
