Which of the following statements is true according to what you hear

A．Prices for houses in big cities have started to rise since this year.

B．People buy and sell houses to improve their living conditions.

C．Economists believe that residence prices would drop.

D．Economists warn people that price rise might slow down.

导致新生儿黄疸的药物是

A．四环素
B．反应停
C．氯霉素
D．新生霉素
E．磺胺