题目

After the terrible traffic accident happened, many doctors and nurses were called to ______ the passengers. A . rescue B . value C . support D . welcome 答案：A19．下列实数中是无理数的是（　　）A．$\sqrt{4}$B．πC．0.$\stackrel{•}{3}$$\stackrel{•}{8}$D．-$\frac{22}{7}$