下列人体器官成对的是（ ）
A．肝脏
B．心脏
C．肾脏
D．胃
答案：C
燃气轮机的工作原理是什么？
He noticed that Joan was studying him closely, but her expression gave away nothing of what she was thinking.
A．revealed
B．disposed
C．reminded
D．distributed
