皮皮学，免费搜题
登录
搜题
【单选题】
Paleontologists hypothesize that modern birds evolved from the family of dinosaurs that included Tyrannosaurus rex. This hypothesis would be strongly supported if evidence that dinosaurs from this family had a body covering resembling feathers could be found, but so far no such evidence has been found. Which of the following, if true, would most help the paleontologists explain why no evidence of feathered dinosaurs has yet been found?A.
Fossilized dinosaurs have shown many birdlike characteristics, such as bone structure and winglike arms.
B.
If birds are in fact the descendants of dinosaurs, then it can be argued that the dinosaurs never really died out.
C.
Flying dinosaurs such as the Pteranodon, which is not thought to have been related to modern birds, do not appear to have had feathers.
D.
Soft tissues such as skin and feathers do not fossilize like bones, and therefore are far less likely to have left permanent evidence in the fossil record.
E.
The thousands of dinosaur fossils excavated by paleontologists represent only a tiny fraction of the billions of dinosaurs that once lived.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】简述胰岛素的不良反应。
【简答题】胰岛素的主要不良反应有哪些?应如何防治?
【简答题】连接地中海和红海的是( )运河。
【多选题】在创新的准备阶段,下列做法中是错误的有( )。
A.
对信息要作些筛选
B.
尽可能广泛的收集资料
C.
找人咨询相关问题
D.
只要收集的资料即可,不需要保存
E.
扩大你的视野,考虑所有也许有助于完成任务的可能资源
【简答题】连接地中海和红海的著名运河是 运河。
【单选题】Why does Jane not want to go to their regular restaurant today?
A.
She is in the mood to try something different.
B.
The new waitress is very unkind.
C.
The food has become too spicy there.
D.
She doesn't want to be around people she knows.
参考解析：
知识点：
题目纠错 0
发布
