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The lecture points out several
inaccuracies with the use of hydrogen-based fuel
cell engines
in
the
support
of
her
claim
that
substituting
them
for
interal-combustion
engines
is
technologically unfeasible,
environmentally unfriendly, and economically
invaluable.
First,
the
lecture
states
that
it
is
impractical
to
replace
internal-combustion
engines
eith
fuel-cell
engines
because
using
the
latter
requires
hydrogen
in
a
pure
form,
which
is
technologically changing
to both obtain and requires hydrogen in a pure
liquid form. However,
the reading
argues that because the hydrogen can be extracted
from many resources including
water,
fuel cell engines powered by this infinite source
of energy is an extremely attractive.
Second, the lecturer refute the reading
by raising that
hydrogen cells are
environmentally
friendly.
She
argues
that
although
engines
that
use
hydrogen
cells
produce
less
pollution,
the
manufacturing
of
hydrogen
cells
generates
large
amounts
of
harmful
byproducts
due
to
the
buring of fossil fuel in the
purification process.
Third, although the reading suggest
that hydrogen-based engines are more fuel-
efficient and
thus economically
competitive than internal-combustion engines, the
professor argues that such
an advantage
is undermined by the fact addition of platinum, a
very rare and expensive material.
In
general,
knowledge
gained
from
books
a
has
a
wider
range
than
that
gained
from
experience,
we
now
live
in
a
world
that
typophile
is
no
longer
exorbitant,
and
that
printed
matters
are
readily
available.
In
libraries,
we
can
learn
nearly
any
kind
of
disciplines
,such
as
physics, chemistry,
mathematics and so on. Unlike the experience of
any individual that is limited
by
the
range
of
that
individual,
books
seem
to
have
almost
no
limitation.
Sitting
in
the
local
library, we travel everywhere through
an interesting geographic encyclopedia and
certainly, with
nearly no expenses at
all.
On the other hand, it
can be argued that sometimes knowledge gained from
experience is
much
deeper
and
more
comprehensive
than
that
gained
from
books.
It
is
quiet
true
that
not
every thing is contained
in books. How to deal with personal finance, how
to cope with current
social trends,
even how to most effectively organize our own
mind, and numerous other things
can
seldom be found thoroughly and comprehensively
discusses in books discussed in books, we
have
to
gain
the
knowledge
by
our
own
experience.
And
the
sad
news
is
that
even
some
knowledge
that
is
contains
in
books
usually
needs
further
comprehension,
mainly
through
experience.
As
to
which
source
is
more
important,
the
answers
vary.
Some
knowledge
can
be
found
acquired only through books. It is hard
to imagine we can have a good understanding of
history
without
reading
books.
On
their
other
hand,
some
knowledge
can
be
obtained
only
through
experience,. When we
try to learn to swim, merely a detailed manual of
swimming skills, even
abundantly filled
with illustration, is mostly useless. We have to
jump into the water and then
gain
the
knowledge
with
experience.
We
have
to
use
books
and
experience
as
sources
simultaneously to
get what we want to know. Take learning physics
for example, both books and
experience
are equally important sources, and examples as
such are numerous. Therefore, I think
whether one source is more important
than the other depends on circumstances.
The advantages and disadvantages of a
new factory near your community
Live in a primarily
agricultural community, and most of population
lives under the poverty
line. Parents
keep children home from school to work in the
fields. If there is a flood or drought,
people starve. A new factory would mean
regular monthly salaries as well as protection
against
natural disaster or a sudden
drop in the price of our main agriculture, say,
corn.
Regular salaries
would allow families the confidence to make
investments in their futures.
The
locals would be able to plan their finances
accurately and free themselves from debt. This in
turn
would
encourage
entrepreneurship
and
further
develop
the
local
economy.
People
could
begin to open shops,
restaurants, dormitories, and entertainment
facilities to serve the factory
workers
with
their
savings.
Profits
from
these
small
enterprises
would
further
enrich
the
local
community
and
turn
our
relatively
poor
farmland
into
a
truly
profitable
development
zone.
Perhaps more parents could then afford
to send all of their children to high school and
maybe
even college.
There
would
certainly
be
negative
effects
as
well.
If
the
areas
become
prosperous,
immigrants from
poorer regions will come here looking for work.
Because of their relatively poor
farmland into a true poverty they will
work harder for less money than the locals and
drive wages
down. There might be more
immigrants than factory jobs available, leading to
an unemployment
crisis with a rising
crime rate as a potential negative side effect.
On the other hand, the
propose factory would almost certainly have
adverse effects on the
local
environment crisis with the rising crime rate as a
potential negative side effect.
On the other hand, the proposed factory
would almost certainly have adverse effects on the
local environment, particularly in
regards to polluting the water. This is perhaps
the most serious
concern, because
without clean water the area cannot sustain life
of any kind, com. Livestock. Or
human.
However, because of the
relatively desperate economic situation of my
hometown, I believe
the potential
benefits of opening a new factory would outweigh
the risks. If we take the proper
precautions,
such
as
imposing
strict
environmental
standards
and
providing
adequate
social
services for
immigrants, the whole area stands to benefit.
I was born in a small town
named Hailin, located in the north-east of China.
The most serious
problem in my hometown
are the nackw
ard ideas about a woman’s
place in the family, school,
workplace,
and society. The stereotypes not only hurt women,
but also hurt the entire society as
well.
If
possible,
I
would
like
to
change
people’s
attitude
towards
women.
I
really
hope
that
women and men enjoy the equal status in
my hometown.
Discrimination
against women in my hometown begins before they
are even born. Because
people there
only a man can carry on the family line, so that
every family has at least one son.
However,
each
family
is
only
supposed
to
have
one
child
because
of
the
one-child
policy.
This
may
lead to the consequence that if a family knows
that the baby is female before she is born,
they may take action to abandon it. As
a matter of fact, if the importance of female
babies and
male babies is equally
considered, this kind of ridiculous phenomenon
will not appear.
What’s
worse,
the
discrimination
against
girls
continues
as
they
attend
schools
and
work