It’s said that there’re plenty of hotels in that town. There ______ be any difficulty for you to find somewhere to stay today.

A．wouldn’t

B．mustn’t

C．shouldn’t

D．needn’t

天线方位角设定符合系统设计要求，精确到正负（）度，天线俯角的设定符合系统设计要求，精确到（）度.

A.5，1

B.4，1

C.5，0.5

D.4，0.5