已知关于x的一元二次方程x2-2x+k-3=0有两个不相等的实数根，求k的取值范 发布时间：2017-04-30 12:31 │ 来源：www.tikuol.com 题型：解答题 问题： 已知关于x的一元二次方程x2-2x+k-3=0有两个不相等的实数根，求k的取值范围．
题型：解答题 美国总统杜鲁门在国会咨文中说：“极权政制的种子，是靠悲惨和匮乏滋养发育的。……全世界的自由人民期待我们支持他们维护自由。”对此理解不正确的是[ ]A．“极权政制”是指 * * 主义B．“自由”主要指资本主义制度C．美国目的是维护二战后的世界和平与自由D．这一政策被称为杜鲁门主义 查看答案
题型：解答题 选用表格内的单词，用其正确形式填空。fast, own, at, science, feel, relax, hunger, service, comfortable, special, leave, eat Restaurant science Restaurant 1. have to know how to make food. They also have to know how to make money. Here are some things they've learned from 2. studies. The color red makes people 3. . Red also makes customers eat faster. Many fast food restaurants, therefore, have red furniture or walls. Soft colors like pink and light blue make people 4. , so they spend more time 5. their meals. Softlighting makes people look good, but it makes food look bad. Loud music may be nice 6. first, butit soon makes people want 7. . Hard seats also make customers want to eat quickly and leave. Manyrestaurants, 8. fast food restaurants, use this knowledge to make customers eat 9. . Customersonly sit for about 20 minutes before they leave. Because customers don't stay very long, small restaurants can 10. many people every day. 查看答案