选出句中错误并改正。 ( ) 1. The socks in the schoo

以下关于新型隐球菌的叙述，不正确的是()

A．有宽大的荚膜

B．大多是外源性感染

C．主要经呼吸道感染

D．鸽子可能是本菌的自然宿主

E．不易侵犯神经系统

看单词，找规律，下一个是谁？选择正确答案。

1. nine, twelve, nine, twelve, ______________[ ]

A. nine

B. twelve

2. English, lunch, school, English, lunch, school, English, _____________[ ]

A. lunch

B. English

3. hall, office, hall, office, school, ____________, office, school, classroom[ ]

A. school

B. hall

Jack still came to school _______ he was ill. [ ]

A. though

B. but

C. if

D. so

单沟型水沟系的水流途径是：进水小孔----中央腔---出水孔。（）