已知函数若则 ( ) A. B. C. D.与的大小不
The basketball game was invented by a Canadian doctor James Naismith. A. was called B. to call C. named D. calling
(08年银川实验中学月考)(4分)质量为0.5kg的物体从高处自由落下,前2s内重力做功的平均功率是_________W,2s末重力对物体做功的瞬时功率是_________W(取g
质点所受的合力F随时间变化的规律如图所示,力的方向始终在一直线上,已知t=0时质点的速度为零,在图示的tl、t2、t3和t4各时刻中 A.t1时刻
Practicing Chinese Kung fu can not only ____ your strength, but also develop your character. A. bring up B. take up C. build up D. pull up
下面句子没有语病的一项是( ) A 、过了一会儿,他突然渐渐地停下来了。 B、通过这次社会实践活动,使我们磨练了意志,增长了见识。 C、我们
Martin Cooper , a US researcher , was considered _______ the first cell phone . A. invented B. to invent C. having invented D. to have invented
下列关于生长素生理功能的叙述,错误的是( ) A.生长素能促进果实的发育 B.生长素能促进扦插枝条生根 C.生长素能促