在牛乳培养基中能产生“汹涌发酵”现象的细菌是()

A．破伤风梭菌

B．诺维梭菌

C．肉毒梭菌

D．产气荚膜梭菌

E．艰难梭菌

—Why don’t you like winter in Beijing?

—Because it is        winter in Guangzhou.

A．as cold as

B．much colder than

C．not so cold as

D．not colder than