承载板法测定土的回弹模量时，应先进行1～2次预压，每次预压1min。( )
参考答案：对
急性上消化道出血临床观察最早出现变化的是（）
A.血红蛋白减少
B.血尿素氮减少
C.发热
D.末梢循环改变及心率加快
E.血压下降
The cool water stops the burning process，prevents the pain unbearable and reduces swelling.
A．become
B．became
C．becomes
D．becoming
