救援时要注意，防止被溺水者紧抱缠身而双双发生危险。如被抱住，不要相互拖拉，应放手自沉，使溺水者手松开，再进行救护。
参考答案：对
Tom Kate since two years ago, and they have had a child.
A．got married with
B．married to
C．has been married to
D．married
用8051的定时器T0定时，用模式2，则应（）。
A.启动T0前向TH0置入计数初值，TL0置0，以后每次重新计数前要重新置入计数初值
B.启动T0前向TH0、TL0置入计数初值，以后每次重新计数前要重新置入计数初值
C.启动T0前向TH0、TL0置入计数初值，以后不再置入
D.启动T0前向TH0、TL0置入相同的计数初值，以后不再置入
