问题
问答题 简答题
简叙背斜和向斜的特点。
答案
参考答案：
一般情况下，背斜的岩层向上隆起，在未发生地层倒转情况下两翼产状相反，核部岩层老、翼部岩层新，由核部向两侧岩层对称重复出现。一般情况下，向斜的岩层向下凹陷，未发生地层倒转情况下两翼产状相反，核部岩层新、翼部岩层老，由核部向两侧岩层对称重复出现。
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简叙背斜和向斜的特点。
参考答案：
一般情况下，背斜的岩层向上隆起，在未发生地层倒转情况下两翼产状相反，核部岩层老、翼部岩层新，由核部向两侧岩层对称重复出现。一般情况下，向斜的岩层向下凹陷，未发生地层倒转情况下两翼产状相反，核部岩层新、翼部岩层老，由核部向两侧岩层对称重复出现。
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| Everyone 1 gifts. Some little kids think they don't get enough gifts. Some old people think they get too many gifts. Different people like different kinds 2 gifts. Gift giving is different in different 3 .In Japan,people sometimes give 4 gifts. But they are not opened. Later,the same gift may be given 5 to someone else. Many people have enough things and don't want too many gifts 6 .In the USA,some people ask their 7 and friends to give money to 8 rather than buy them gifts.In Sweden,doing something for someone is the 9 gift. People don't need to spend too much money.Instead, 10 a meal is enough. | |
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