太晚了.It ’s _____ late.

滤纸层数过多
溶液黏度偏大
沉淀杂质过多
过滤速度过慢可以用抽滤的方法进行分离操作

原句有误.连不成好句子.There应为These
These shoes are too small for me to wear.

在任意梯形ABCD中,AD平行于CD.请你只用直尺（无刻度）作出底AD和BD的中点,并证明作图的正确性
点A是∠MON内任意一点,求作△ABC,使B在OM上,C在ON上,且使△ABC的周长最小,试说明理由.
已知在△ABC中,∠ACB=90°,AC=BC,AE是角平分线,ED⊥AB,垂足为D
求证：（1）.AE垂直平分CD
(2).AB=AC+CE
Americans think muche about time.From children they _1_ to
value(珍惜）time.As children they are taught to be on time _2_
to school,to work and to do everything.When they are having a
good time,they _3_that time flies.When a person is dying(生命垂危）
they say he is living on _4_ time .
Time is money.Time is _5_ in America.A working American has to
work hard for eight hours a day or forty hours _6_.This is the
working time.In his free time,he also works hard _7_ more
money.Even on Saturday and Sunday he aslo works hard as
usual.In the street you can _8_ see that a man walks slowly.
They walk very fast.In fact,they are running.
They love _9_because time can bring them money and a lot of
things.But sometimes they also _10_time,because they feel that
they have become serants(仆人）of the clock.
1.A.teach B.learn C.work D.play
2.A.going B.go C.to go D.went
3.A.say B.tell C ask D speak
4.A lent B borrow C lend D borrowed
5.A something B anything C everything D nothing
6.A a day B a week C a month D an hour
7.A for B on C with D at
8.A nearly B hardly C almost D always
9.A money B work C time D knowledge
10.A hate B love C feel D like
Once there was a boy in Toronto.His name was Jimmy.He started drawing when he was three years old,and when he was five he was already very ___1___ at it.He drew many beautiful interesting pictures,and many people ___2___ his pictures.They thought this boy was going to be ___3___ when he was a little older,and then they were going to ___4___ these pictures for a lot of money.
Jimmy's pictures were quite different from other ___5___ because he never drew on all of the paper.He drew on ___6___ of it,and the other half was always ___7___.
"That's very clever," everybody said."___8___ other people have ever done that before."
One day somebody asked him,"Please tell me,Jimmy.Why do you draw on the bottom (底部) half of your pictures,___9___ not on the top half?"
"Because I'm small," Jimmy said,"and my brushes (毛笔) can't ___10___ very high."
1.A.poor B.sad C.glad D.good
2.A.bought B.brought C.sold D.took
3.A.different B.clever C.famous D.rich
4.A.buy B.show C.leave D.sell
5.A.men's B.people's C.boy's D.child's
6.A.half B.part C.side D.end
7.A.full B.empty C.wrong D.ready
8.A.No B.Some C.Any D.Many
9.A.then B.and C.but D.or
10.A.change B.turn C.pull D.reach
Monday is the beginning of the week; it is the day most Americans like worst.The day they ___1___ most is Saturday.Saturday is the ___2___ of the workweek; it is the beginning of the weekend.
Life is ___3___ on the weekend; most Americans ___4___ care of their houses,cars and gardens.They sleep ___5___ in the morning.They enjoy the feeling that the time ___6___ to move more slowly.
The workweek is for things you ___7___ to do; the weekend is for things you ___8___ to do.Some people may get in a car for a ___9___ in the country.They like to take part in a sports activity out of doors.And on Saturday night they might go to public eating ___10___ or a film.
1.A.like B.dislike C.spend D.leave
2.A.middle B.beginning C.end D.day
3.A.worse B.difficult C.better D.different
4.A.make B.take C.look D.pick
5.A.earlier B.later C.faster D.shorter
6.A.decides B.wants C.spends D.seems
7.A.enjoy B.hate C.have D.find
8.A.like B.start C.get D.check
9.A.drive B.walk C.fishing D.washing
10.A.place B.house C.room D.apartment

6A的插座肯定不行,从功率=电流*电压得知,1500W的热水器会有6.8安的电流,而插座6A的最高电流负荷,插座长时的超负荷工作会发热起火、烧毁电器等事故的发生,为此建议立即更换.在选购插座时,建议购买正牌货,这样品质才会有保障.

RS-232-C是美国电子工业协会EIA（Electronic Industry Association）制定的一种串行物理接口标准.RS是英文“推荐标准”的缩写,232为标识号,C表示修改次数.RS-232-C总线标准设有25条信号线,包括一个主通道和一个辅助通道.在多数情况下主要使用主通道,对于一般双工通信,仅需几条信号线就可实现,如一条发送线、一条接收线及一条地线.RS-232-C标准规定的数据传输速率为每秒50、75、100、150、300、600、1200、2400、4800、9600、19200波特.RS-232-C标准规定,驱动器允许有2500pF的电容负载,通信距离将受此电容限制,例如,采用150pF/m的通信电缆时,最大通信距离为15m；若每米电缆的电容量减小,通信距离可以增加.传输距离短的另一原因是RS-232属单端信号传送,存在共地噪声和不能抑制共模干扰等问题,因此一般用于20m以内的通信.

3到四天

首先,学习语言是需要耐心的,不要气馁,努力就会有进步.
第二,我是来拿分的,希望我们都能有收获.
以下是我的分析：
How often do you go to the park?
a. five days b. i do not know.
c. five days a week d. five times a week
我选择的是C但是答案是D,为什么?
这道题问的是做一件事的频率,用often来提问.
回答有几种形式：
1. every ... (every week/every three days)
2. ... times + 一段时间（a week,a month...)
所以答案就出来了.
语法解析一下
do you know what the best drink is?
what is the answer ____ the questions?
A.with B.on C.of D.at
这道题questions（复数）是问范围,有of,among可以回答.应该选C,其它的都不表示范围.此题可以出现一个变体,question单数时,答案则为“to”.
Advice：课下学习很好,但上课听讲勤提问才是王道.

Tring harder
My mother talked with me today.Ingeneral,she doesn't think I'm doing well at home.I have to do better.According to my mother,I clean my room too carelessly.I should clean more carefully.Inaddition,I do my homework too slowly.I should do faster.Furthermore,I eat too slowly.I should eat faster.I want to do well at home,and I know now that I have to try a little harder.

I can't love too much.

not too bad