汽车运行环境和条件与汽车异常工况无关。

在△ABC中，若∠A=120°，AB=5，AC=4，则△ABC的面积S=（    ）。

群落交错区

阅读理解

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1. By dialing 414-479-9860, a fan of Michael Jackson can buy ____   from the seller.

A. an iPod      

B. a CD player      

C. a Thriller album  

D. a music skin

2. According to the two advertisements, which of the following statements is true?

A. They are of the best quality.

B. They need to be changed constantly.

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以下关于洞固位形的说法哪项是不正确的（）

A.洞深度应在2mm以上

B.洞底平壁直

C.邻面洞应在咬合面做鸠尾

D.洞缘有洞斜面

E.轴内聚2°～5°

颐和园附近要建的电塔工程，在一片反对的声浪中进入环保听证程序。事件到此并没有画上句号，它不仅考验着市民维护家园的决心和城市决策者的智慧，还关系到类似颐和园的众多风景名胜资源和文物的命运。
从这段文字我们不能推出的是( )。

A．电塔工程至此还没有正式开工

B．电塔工程不是一个错误的决策

C．多数市民维护家园的决心比较强

D．受到此种威胁的景点不止是颐和园