设计人口普查程序，用一个变量表示海南省的人口总数，这个变量的类型应是（）。A、整型 发布时间：2017-07-06 19:24 │ 来源：www.tikuol.com 题型：单项选择题 问题： 设计人口普查程序，用一个变量表示海南省的人口总数，这个变量的类型应是（）。A、整型B、实型C、长整型D、双精度型
题型：单项选择题 阅读下面一篇材料，从所给的A-G七个选项中，选出正确的选项填空，使短文通顺、内容完整。 People all over the world do shopping in supermarkets. Who decides what you buy in the supermarkets? 1._____________ When you go into the supermarket, you see shelves full of things.2.______________You pull a shopping cart and put the things you choose in it. If you hear soft and slow music, you may walk slowly. If you hear fast and loud music, you may walk quickly. 3._____________You walk slowly and have more time to choose things. Suppose you go to the meat department first. 4._____________The cheaper meat is at the other end ofthe meat department, away from where the customers enter. You have to walk by all the expensive meant before you find the cheaper one. 5.______________. That's some knowledge of supermarket science. Many supermarkets use such knowledge to make customers stay longer and buy more. A. Maybe you will buy some of the expensive meat instead of the cheaper meat. B. You walk between the shelves. C. That's why the supermarket plays slow and soft music. D. The manager of the supermarket knows where the customers enter the meat department. E. Do you decide or the supermarkets decide? F. You may feel a little tired to find the cheapest meat. G. You should learn some knowledge of supermarket science. 查看答案
题型：单项选择题 下列研究动物行为的方法中，属于实验法的是（ ）A．用摄像机拍摄猎豹的运动，研究猎豹追击猎物的方法B．用望远镜观察鸟类繁殖期的活动C．动物园用闭路电视研究东北虎生育幼虎的过程D．用声波干扰水中活动的海豚，观察海豚对声波反应的敏感性 查看答案
题型：单项选择题 以下关于散光的说法正确的是（）。A.现实生活中容易找到一只完全没有散光的眼睛B.散光的主要症状是视力降低和视物疲劳，有时产生视物变形，头痛C.散光与角膜曲率异常没有关系D.顺规散光指角膜高屈光力子午线位于水平位E.以上说法都正确 查看答案