Last month, Justin Valdez, a college student, was shot in a subway station in San Francisco. The surveillance video(监控录像) showed that before Justin was killed, the killer pulled out his gun
下列四幅图像中既不是描述匀速直线运动，又不是描述静止状态的图像是
一支水银温度计中装有2g水银，水银吸收5. 6J热量后，温度计的读数由25℃上升到多少摄氏度？【已知水银的比热容是c水银=0.14×103J/（kg·℃）】
She made one or two remarks which suggested that the company _____in financial trouble. A. is B. be C. was D. should be
The two _______ both bought some _______in the market. A. Germen ; potatoes B. Germans； potatoes C. Germans; potatos D. Germen; potatos
漫画反映了某地政府的做法是 A．坚持以人为本，努力为民增加收入 B．坚持对民负责，有效提升政府形象 C．进行文化建设，积极弘扬向上精神 D
有一个容量为50的样本，数据的分组及各组的频数如下： ［12.5,15.5 3; ［24.5,27.5 10; ［15.5,18.5 8; ［27.5,30.5 5; ［18.5,21.5 9; ［30.5,33.5 4; ［2
，判断
的奇偶性，并加以证明．
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