3．下列各句中，加横线的成语使用恰当的一项是（ ） A．该产品的试用效果非常好，相信它大量投产后将不孚众望，公司一定会凭借产品的优
如图4-3-4所示，用一本书托着黑板擦在竖直平面内做匀速圆周运动(平动)，先后经过A、B、C、D四点，A、B和C、D处于过圆心的水平线和竖直线上，设书受
在室温下，1升某气体分别与4升氧气混和，在引燃后将气体通过浓硫酸，剩余气体回复至室温时体积变为2升，则该气体是: ①乙烷 ②乙烯 ③乙炔
—Where shall we go for the holiday，to the beach or into the mountains? —________ I don't really mind. A．Forget it! B．Why not? C．What's the point? D．It's up to you!
________ the plan has been made, let’s get down to ________ it out. A. Now that; carryB. Because; carry C. Since; carryingD. Now; putting
李强的家里养了一盆观赏植物——肾蕨，为了使它长得好，你认为他应该怎样做（ ） A．放在向阳的地方，多浇水 B．放在背阴
完形填空 Television has now come to nearly every family. It has _1_ a very important part in _2_life. School children in the U.S. watch TV about twenty-five hours a _3_. Some parents feel
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