问题
填空题
下表中,如果x和y成正比例,“?”处填______;如果x和y成反比例,“?”处填______.
|
答案
设如果x与y成正比例,那么“?”是a,
a:24=4:12,
12a=24×4,
a=
,24×4 12
a=8;
(2)如果x与y成反比例,那么“?”是b,
24b=12×4,
b=
,12×4 24
b=2;
故答案为:8,2.
下表中,如果x和y成正比例,“?”处填______;如果x和y成反比例,“?”处填______.
|
设如果x与y成正比例,那么“?”是a,
a:24=4:12,
12a=24×4,
a=
,24×4 12
a=8;
(2)如果x与y成反比例,那么“?”是b,
24b=12×4,
b=
,12×4 24
b=2;
故答案为:8,2.
阅读理解。 | ||
| ||
1. According to Advertisement I, the famous yearly competition is _____. | ||
A. a music competition B. an eating competition C. a cooking competition D. a picture-taking competition | ||
2. People who come to watch the competition earliest may _____. | ||
A. get the best watching position B. get the best food C. watch whatever they want to D. take good pictures | ||
3. The best title for Advertisement II would be _____. | ||
A. The Vikings B. Reliving of the Vikings C. Frojel D. A Viking Reliving Society | ||
4. From the advertisement we know that Frojel used to be _____. | ||
A. a Viking club B. a family-based society C. a European island D. a trading center |