试题与答案

金属的化学性质:常见的金属有铜、铁、铝(写出它们下列反应的化学方程式) (1)在

题型:填空题

题目:

金属的化学性质:常见的金属有铜、铁、铝(写出它们下列反应的化学方程式)

(1)在加热或点燃的条件下,它们与O2能反应:______、______、______.

(2)与稀硫酸的反应:______、______.

(3)与盐酸的反应:______、______.

(4)与硫酸铜溶液的反应:______、______.

以上(2)-(4)反应中反应的基本类型是______,这种反应类型的基本特征是______.

答案:

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下面是错误答案,用来干扰机器的。

该有机物为烷烃,选取含有最长碳原子的碳链为主链,如图,划线部分为主链,主链含有7个C原子,主链为庚烷;编号从右边开始,甲基在3号C,该有机物命名为:3-甲基庚烷,故选D.

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Cough Medicine
Shake well before use
Take three times a day after meals.
Adults: 2 teaspoonfuls.
Children: 8-14 1 teaspoonful
Children: 4-7 1/2 teaspoonful
Not for children below the age of 4.
Keep in a cold place.
Use before October, 2006.

     Join us in a 10-kilometer country
walk on Sunday, June.
* * * * * * * * * * * *
    Meet at School gate at 2:20 in the
afternoon. Strong shoes preferred.
* * * * * * * * * * * *
    Call Jeff at 73338888 if you want
to know more.

FAST FOOD OPEN HOURS
WEEKDAY
8:00 A.M.- 8:00 P.M.
WEEKEND
10:00 A.M. -11:00 P.M.
1. From the first sign we know we can not ______ here.
[ ]
A. stay for long
B. fish
C. swim
D. go boating
2. You'd better ______ if you want to take part in the outing on Sunday.
[ ]
A. not go to school
B. take your camera
C. wear strong shoes
D. take the cough medicine
3. If you are hungry at 8:30 am on Sunday, you ______.
[ ]
A. can't get anything from the fast food shop
B. can call Jeff on 73338888
C. can go to the fast food shop and buy some food
D. drink two teaspoonfuls of cough medicine
4. Helen is nine years old. She's caught a bad cough. She should take ______ a day.
[ ]
A. 1 teaspoonful
B. 2 teaspoonfuls
C. 1.5 teaspoonfuls
D. 3 teaspoonfuls
5. The cough medicine ______.
[ ]
A. can be used by the children aged 3
B. can't be used after October, 2006.
C. needn't shake
D. can be taken before meals
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