题目

The news that the scientists in China are trying the ways to reduce the fog and haze was ______ on the radio yesterday.   A. turned out         B. found out      C. given out          D. carried out 答案：C人体剧烈运动时，呼吸加快，心跳加速，直接参与这种变化调节的是（　　）A．运动系统B．神经系统C．消化系统D．循环系统