题目

根据句意和汉语注释，写出单词的正确形式。 1. Look out! There is too much                   (来往车辆) in this street.  2. The hall is well decorated with many lanterns              (悬挂) from the ceiling.  3.             (无论如何)，it is worth trying again.  4.The                 (人口)of China will increase quickly because of the new policy.设随机变量服从正态分布N（0，1），记φ（x）=P（ξ＜x），则下列结论正确的是（　　）A．φ（0）=0B．φ（0）=12C．φ（-x）=φ（x）D．φ（-x）=-φ（x）