题目

某物体做自由落体运动，把下落总高度分为三段，从起点计时通过三段的时间之比为。则三段高度之比为（    ） A．       B．       C．       D． 答案：D    根据句子意思和音标、首字母提示填词，每空一词。【1】Nothing is a ______ /west/if you have a creative mind.【2】We ______/vlju:/ the time we spend with our family and friends in our everyday lives.【3】China is the biggest country in A______.【4】It’s i______ to speak loudly in public.【5】My bike is broken, my father is r _____it.