小刚家准备建一栋新房，爸爸买了一堆材料相同的石子，小刚选取一块石子在实验室测它的密度．
他先将托盘天平放在水平桌面上，调节托盘天平平衡时，发现指针停在分度盘的右侧，要使天平平衡，应将横梁右端的平衡螺母向 (左／右)移动；当他用天平测物体质量时，发现指针偏向分度盘的左侧，这时应该在天平右盘中 (增加／减少)砝码；
测小石子的密度，主要实验步骤是： A．用量筒测出小矿石的体积；B．将小矿石从水中取出，立即放在已调节平衡的天平盘上，加减砝码和调节游码，测出小矿石的质量；C．再用密度计算公式求出小石子的密度．请你评估：这一实验过程测算出的密度结果______(选填“偏大”、 “偏小”或“准确”)，原因是_______________________．

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③                                                      ．
纠正错误后继续实验，当盘中所加砝码和游码位置如图19乙所示时天平平衡，则此石子的质量为      g．在量筒内装有一定量的水，该石子放入前、后的情况如图19丙所示，则石子的体积是       cm³，此石子的密度是           kg/m³．查看习题详情和答案>>

Some girls are waiting__ a bus _ the bus stop.

A.
for,／
B.
for, at
C.
at,／
D.
at, for

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完型填空。（本题10小题，每小题1分，共10分）
Welcome to Wenzhou 1, everyone! Let me 2 you many different animals today. Listen! Many 3 are singing in the tree. Can you see some monkeys? They are clever and like 4 bananas. Look! There are many koalas. They 5 from Australia. They are quiet, 6 and cute. Children like them. Oh, there’s a tiger in the cage（笼子）7 the tree. It eats a lot of 8 every day. I like pandas best 9 they live only in China. Animals are our friends, we should take care of （照顾）them. I’m 10 you’ll have a good time here.

18-year-old girl called Anna from England visited Great Wall last Friday .

House For Sale

Red Rose Garden，Pudong

3-storey（层） home，509 sqm（平方米） total land area，428.8 sqm built-in, 312.9 sqm garden.

Asking RMB13 million (USDl.57 million).

MP: 13761973547 Tel: 021—58609228 Fax: 021—58609728

Job Wanted

Cherry, 24, a shining girl, good at oral English and putonghua. Now I am working at an international trade (国际贸易) company in Guangzhou. I am kind-hearted, hard-working and healthy, and would like part-time weekend work offering putonghua lessons to foreign friends. If you are interested, please e-mail me at cherryif@hotmail.com.

Beijing Snow World Ski Park

Price: 18 yuan (ticket), 50 yuan／hour on weekdays and 70 yuan／hour at weekends, 120 yuan／four hours on weekdays and 190 yuan／four hours at weekends.

Tel: 010—69191617

1.If an Australian student wants to learn Chinese，he or she can __________.

A．call 021—58609228 B．fax 021—58609728

C．e-mail cherryif@hotmail.com D．telephone 010-69191617

2.How many square meters is the garden of the house for sale?

A．509 sqm B．428.8 sqm C．312.9 sqm D．741.7 sqm

3.Where is Cherry working now?

A．Shanghai B．Guangzhou C．Beijing D．Pudong

4.If Nick goes skiing in Beijing Snow World Ski Park，he has to pay more money on _______ than on Tuesday.

A．Sunday B．Friday C．Wednesday D．Monday

5.If you want to ski for four hours on weekdays，how much money will you pay at least?

A．208 yuan B．200 yuan C．138 yuan D．280 yuan

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Some girls are waiting________ a bus _______ the bus stop.

试题分类

Some girls are waiting__ a bus _ the bus stop.