下面一段话中，加点的熟语运用恰当的一项是： 街上车流如洪水，各种“紧急拆迁，疯狂甩卖”令我厌恶，振聋发聩的流行歌曲令我烦躁，我发现我竟
定义在上的函数是奇函数，且，，则 （ ） A．8 B．10 C．12 D．14
如图所示。两个质量均为m的小球A、B用轻杆连接后斜放在墙上处于平衡状态，已知墙面光滑，水平地面粗糙。现将A球向上移动小段距离，两球再次处于
已知，关于x的方程x2－2mx＝－m2＋2x的两个实数根x1，x2满足|x1|＝x2，求实数m的值．
D As I was reading a recent story in Slate on 20-somethings complaining about how the economy was ruining their life plans, I couldn’t help but think the 20-somethings sounded like a bunch of spoile
某CaCl2样品中可能含有FeCl3、MgCl2、NaCl和Na2CO3中的一种或两种。将11.1克此样品溶于水只得到无色溶液，加入足量的AgNO3溶液得沉淀29.7克，由此可知所含杂
单项选择 This is ____useful book. I want to buy it. A. an B. a C. the D.\
We have made _____ clear that we are strongly against smoking in the office. A. this B. it C. that
