语言类
公务员类
工程类
语言类
金融会计类
计算机类
医学类
研究生类
专业技术资格
职业技能资格
学历类
党建思政类
英语证书考试
大学英语考试
全国英语等级考试(PETS)
英语证书考试
英语翻译资格考试
全国职称英语等级考试
青少年及成人英语考试
小语种考试
汉语考试
单选题Both plants and animals of many sorts show remarkable changes in form, structure, growth habits, and even mode of reproduction in Line becoming adapted to a different climatic envi- (5) ronment, type of food supply, or mode of liv- ing. This divergence in response to evolution is commonly expressed by altering the form and function of some part or parts of the organism, the original identity of which is clearly dis- (10) cernible. For example, the creeping foot of the snail is seen in related marine pteropods to be modified into a flapping organ useful for swimming, and is changed into prehensile arms that bear suctorial disks in the squids (15) and other cephalopods. The limbs of various mammals are modified according to several different modes of life for swift running (cursorial) as in the horse and antelope; for swinging in trees (arboreal) as in the monkeys; (20) for digging (fossorial) as in the moles and gophers; for flying (volant) as in the bats; for swimming (aquatic) as in the seals, whales, and dolphins; and for other adaptations. The structures or organs that show main change in (25) connection with this adaptive divergence are commonly identified readily as homologous, in spite of great alterations. Thus, the finger and wrist bones of a bat and whale, for instance, have virtually nothing in common (30) except that they are definitely equivalent ele- ments of the mammalian limb. Directions: For the following question, consider each question separately and select all that apply.
进入题库练习
单选题BADGER: BOTHER::
进入题库练习
单选题It can be inferred from the passage that the author would be more optimistic about optical computing if which of the following were true?(A) Digital partitioning algorithms could be applied to electronic, and not just optical circuits.(B) The speed of photons could be shown to be significantly greater than that of electrons.(C) The precision level in basic operations can be substantially increased without great expense.(D) The accuracy of electronic circuits used to preprocess input data and post- process data could be greatly increased.(E) The microchips optical computer systems were shown to require an increasing density of interconnections.
进入题库练习
单选题PREJUDICED:(A) sappy(B) uncomplicated(C) unbiased(D) insensitive(E) even-tempered
进入题库练习
单选题DISGORGE:(A) encompass(B) bury(C) substitute(D) ingest(E) coagulate
进入题库练习
单选题If y - x = 2 and y -z =3
进入题库练习
单选题SQUANDER : ENERGY ::(A) gamble : money(B) accomplish : attainment(C) shelter : security(D) aggress : territory(E) malinger : duty
进入题库练习
单选题EXPEL: SCHOOL ::
进入题库练习
单选题It can be inferred from the passage that the tabula rasa view of Condillac (line 19) presented the brain as which of the following?
进入题库练习
单选题Asquareandanequilateraltriangleeachhavesidesoflength5.Whatistheratiooftheareaofthesquaretotheareaofthetriangle?
进入题库练习
单选题DRAFT: CONSCRIPT::(A) levy: laborer(B) subpoena : witness(C) employ : staff(D) induce : sheriff(E) select : member
进入题库练习
单选题
进入题库练习
单选题f(t)=kt,forallt,wherekisaconstant,
进入题库练习
单选题The author asserts that the historians discussed in the passage have
进入题库练习
单选题OnacertainFrench-Americancommittee,ofthemembersaremen,andofthemenareAmericans.IfofthecommitteemembersareFrench,whatfractionofthemembersareAmericanwomen?
进入题库练习
单选题EPHEMERAL: ENDURING::
进入题库练习
单选题PERSPICACITY: ACUTE::
进入题库练习
单选题ThefigureaboveshowsarectangularplayareainwhichonechildstandsatBwhileanotherchildrunsbackandforthalongtheentiresideAD.IftherunningchildisinapositionrandomlylocatedalongsideADatagiventime,whatistheprobabilitythatthetwochildrenareatmost50feetapartatthattime?
进入题库练习
单选题INADVERTENCE:(A) complete loyalty(B) attentiveness(C) group movement(D) disagreeable characteristic(E) powerful mind
进入题库练习
单选题POSE: AFFECTATION ::
进入题库练习