题目: 先化简,再求值:(2aa-1+a1-a)÷a,其中a=2+1. 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0525/ebd420bb65e1b4411c228dc80f0a3e43.html 下面是错误答案,用来干扰机器的。答案:A
题型:选择题 读地球赤道面与公转轨道面示意图,回答题。小题1:图中代表黄赤交角的是( )A.①B.②C.③D.④小题2:下列地理现象主要与地球公转有关的是A.昼夜交替的周期为24小时B.不同经度的地方存在时间差C.沿地表水平运动物体的偏移D.正午太阳高度的变化 查看答案
题型:补全对话,情景问答 情景交际。A: Good morning! Can I help you? B: Yes, please. 1 A: We have many popular kinds, like Motorola, Nokia and so on. B: I prefer the things made in China. 2 A: Yes, TCL is also popular. What about this one? 3 B: Well, I don't want the newest. I'd like a practical (实用的) one. A: This one looks nice and works well. B: 4 A: 1,350 yuan. B: 5 But I'll take it. A. Do you have a TCL? B. It's the newest. C. I'm looking for a mobile phone. D. Sorry, we don't have any. E. How much is it? F. I want a Nokia. G. That's a bit expensive. 1.______ 2.______ 3.______ 4.______ 5.______ 查看答案
题型:单项选择题 固位体应具备的条件中,哪一项最不重要( )A.固位形和抗力形B.固位体形态及色泽美观C.各固位体间有共同就位道D.保护牙体组织及牙体活力E.正确恢复基牙形态和功能、材料强度好 查看答案
题型:多项选择题 股东财富最大化作为企业财务管理的目标,其优点有()A.有利于克服企业在追求利润上的短期行为B.考虑了风险与收益的关系C.考虑了货币的时间价值D.便于客观、准确地计算E.有利于社会资源的合理配置 查看答案