在一个数的末尾添上一个“0”以后，得到的数比原来的数大54，原_爱下问搜题

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问题解答题

在一个数的末尾添上一个“0”以后，得到的数比原来的数大54，原来的数是多少？

答案

54÷（10-1）=6

完形填空

完形填空。
     Here is the Mascot "Haibao" of the Shanghai World Expo (世博会). It is from a Chinese character
meaning people.
     The Shanghai World Expo welcomes __1__  people from all over the world every __2__. It has a
group of special visitors __3__  May 16. They __4__  16 little reporters from Germany and __5__.
     Ding, 14, is one of them. She is __6__ Shanghai. "We __7_   a lot here. Adult reporters teach us
how to __8_   photos. I also make friends with Sophie from Germany. I'm happy to make __9_ _
friends," she says.
     These little reporters visit a lot of pavilions (展馆) every day. They also interview (采访) visitors from
other countries in the Expo Park. They often talk __10     their lives together.

( )1. A. many
( )2. A. day
( )3. A. in
( )4. A. am
( )5. A. the USA
( )6. A. for
( )7. A. learns
( )8. A. put
( )9. A. new
( )10.  A. of

B. all the
B. year
B. at
B. is
B. China
B. to
B. learning
B. take
B. old
B. about

C. a lot
C. one
C. on
C. be
C. Japan
C. of
C. learn
C. takes
C. bad
C. for

D. lot of
D. time
D. into
D. are
D. France
D. from
D. to learn
D. puts
D. much
D. to

填空题

化学概念在逻辑上存在如下图所示的关系．

例如：“化合反应”和“分解反应”属于并列关系．

（1）化合反应和氧化反应属于______

（2）单质和化合物属于______

（3）化合物和氧化物属于______

（4）请再举一例：______．