题目

词汇运用 根据短文内容,从方框中选择适当的词并用其正确形式填空,使短文通顺、意思完整。 book, number, photo, way, orange, if, have, help, call, England Hello! My name is Susan Smith. I’m a(n)   1   girl. This afternoon I lost (丢失) my schoolbag on my   2   home. It is black and red. I   3   to find it. A blue pencil-box, a student ID card (学生证) and some   4   are in it. Well, a(n)  5   eraser, a black pen, a pink ruler and a family   6   are in the pencil-box.   7   you find my schoolbag, you can  8  me. M如图所示,某人沿水平方向拉小车,在图上画出重力和摩擦力的示意图____ 【解析】重力的方向竖直向下,作用点在物体的重心,如图重心在物体的几何中心; 物体向左运动,受到的摩擦力向右,作用点也画在物体的重心,如图:
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