PLC是（）的简称，兼有电子控制器与过程计算机的功能。
参考答案：可编程序控制器
_______ , and he felt hopeless.
A．Because Charles was sentenced to death
B．As Charles was sentenced to death
C．Sentenced to death
D．Charles was sentenced to death
利用浮力知识，设计一个测定酒精密度的方案．
