时间:2019-02-21 作者:英语课 分类:托福英语


英语课

 考生要熟知托福文章的宏观框架,从整体上hold住任何一篇考试文章。托福文章结构分为两类,一类是学术论文,以“立论、证据证明、驳论(再立论)”的循环方式打开;另一类是学术说明文,讲授某个科学知识,并不需要驳论,通常以“分类叙述加生动形象的例子展示”,或以“时间轴讲述加生动例子”的方式打开。今天的第一篇和第三篇文章就属于第一类,第二篇文章属于第二类。


  第一篇Day Length and Flowering Plants(白昼长度和开花植物),首段引出话题,描写植物能够感受季节变化,如秋季落叶。第二段开始立论,认为植物感知季节变化也许依靠气温和降雨,但是气温和降雨变化无常(capricious),并不是稳定信号(not reliable signals)(驳论)。而在任何纬度任何一天中恒定规律变化的是光照量,所以推测植物可能依靠光照量的变化来感知季节变化,这被称为植物的光周期现象(photoperiodism)(再立论)但最近研究发现,植物感知的并不是光照时间,而是连续黑暗的时间(驳论再立论)。更深入的研究发现,导致植物感受黑暗的是自身光敏色素(phytochrome)的存在。光敏色素分为两种形式:压制开花状态和促进开花状态。而连续黑暗时间的变化会诱导这两种形式的互相转化。(由表入里,挖掘根本原因)。

标签: 托福阅读
学英语单词
-graphy
a mountain
acrocarps
aluminium-rich
amore
anti-melt finishing
atom-bound electron
beta - adrenergic receptor
calibrated thermocouple
capacitor-discharge welding
carbonized oil
cecocentral
Changamire
chukchi seas
chwa
claim the goods
Cronat
current-voltage characteristic
Davaine's bacillus
Desmos dumosus
devil's pudding
direct tree
discommodated
disk input/output
ECV-T
egressor
election
Elytis, Odysseus
esmint
exert all strength to
extemporizations
fabric-reinforced seal
false spikenard
familial progressive spinal muscular atrophy
Finnhorse
Fleurette
fruit-tree
gilbies
ground swing
heat conduction problem
height at maximum digging radius
high-energy liquid laser
inhomogeneous turbulence
input transformer type
interference wedge
iwc
lactose ferment yeast
laevo-l-
laportea aestuans
law of profit
leaning on
levisticums
light-truck
Lindenfels
line mode switching
Lisafa
lunitidal
macrozamia spiraliss
martinshaws
materiel release order
metal filing
monachist
nail violin
Narsāpur
nerf
neural nets
on the wind
Ornithoboea feddei
oxydesis
periodic electromotive force
photofinisher
pppoe
pre-exemption
pyeloscopy
Quercus yunnanensis
redox system
relievings
Saastal
saccharin insoluble
shit-stir
show stopper
sled-fiber coupling
specific goods
sport competition
stranded caisson
sub-space
Sudaka
superiorship
surface of constant phase
swirl ratio
synapophyses
tail channel
taken precedence over
thermoplastic elastomer
time goes by
triangular ligaments of liver
upstartled
vacuum envelope
Wide Area Augmentation System
witnessest
yellow dirt
zielinski