Epinephrine binds to the same type of receptors in liver, fat, and smooth muscle cells. Yet in liver, glycogen breaks down; in fat, triacylglycerols break sown; and smooth muscle cells relax. How can

假设某网络端口的IP地址是169.67.230.67，该地址的网络号与主机号分别是多少？如果该IP的子网掩码是...

未知题型假设某网络端口的IP地址是169.67.230.67，该地址的网络号与主机号分别是多少？如果该IP的子网掩码是：255.255.255.0，则该地址的网络号与主机号有没有变化，如果有变化的话，则分别是多少？

There are many theories about the purpose of the stones...

未知题型There are many theories about the purpose of the stones. Stonehenge was certainly a ______

-8的3次方根是（ ）。A、-2B、2C、±2D、不存在

单项选择题-8的3次方根是（ ）。