My English teacher's humor was ____ make every student burst into laughter.[ ]

A. so as to

B. such as to

C. such that

D. so that

如果房地产价格时间序列的逐期发展速度( )，就可以计算其平均发展速度。

A．较大

B．较小

C．差距较大

D．大致接近