根据Nelson(2016)的鱼类分类系统,棘鳍鱼总目中的鲈形鱼系包括()亚系和一些目。
A.鮋鳚亚系
B.蟾鱼亚系
C.鰕虎鱼亚系
D.Ovalentaria亚系
A.鮋鳚亚系
B.蟾鱼亚系
C.鰕虎鱼亚系
D.Ovalentaria亚系
第5题
Dr. Sheeler was a little ______ when Mr. Nelson insisted that he come.
A.fussy
B.angry
C.anxious
D.crazy
第6题
Why had there been no calls from the Nelsons for quite some time?
A.Mrs. Nelson's appendix had been taken out two years before.
B.Mr. Nelson had divorced his wife and had married another woman.
C.Mr. Nelson had decided not to bother the doctor any more.
D.Mr. Nelson's former wife had been very well recently.
第7题
Which of the following statements about Ben Nelson is CORRECT?
A.He killed the amendment.
B.He supported the amendment.
C.He broke the deal.
D.He introduced the health care bill.
第8题
What does Prof. Nelson' s assistant do?
A.Make up homework problems.
B.Do research in the library.
C.Teach an introductory economics course.
D.Grade homework sets.
第9题
A.生活在水中的脊椎动物中,哺乳纲的鲸和爬行类的鱼龙都具有与鱼类相似的体型
B.生活在欧亚大陆温带地下的鼹鼠、非洲南部的金毛鼹、澳大利亚的袋鼹分类上相距甚远,但生活方式相似,形态也相似
C.澳大利亚的袋食蚁兽、非洲的土豚、亚洲的穿山甲、南美洲的食蚁兽,具有相似的生活方式和适于捕食白蚁的相似生理结构
D.第四纪的更新世时期,一次大冰川将一群棕熊从主群中分离出来,它们在北极严寒环境的选择之下,发展成北极熊。北极熊食肉,棕熊却以植物为主要食物
第11题
Which statement can be the best title for this article?
A.Dr. Randy Nelson and His New Findings.
B.Animals Resistance to Cancer.
C.Winter and Animals' Immune System.
D.A Light in the Cancer Darkness.