8进制数556转换为16进制数是（）。

A:146 B:166 C:16e D:18e

=（）。

A:1 B: C:-1 D:-e

（）

A:3 B:2 D:1

≧≧≮≯≮≮≯（）

A:A B:B C:C D:D

（）

A:A B:B C:C D:D

（）

A:A B:B C:C D:D

（）

A:A B:B C:C D:D

标准范文
The picture depicts an old man sitting alone in an empty room with nobody but a pot of flower companying him. What’s waiting for him is either to live alone or die alone. Obviously the cartoon demonstrates a social phenomenon, which is becoming more and more common nowadays. It tells people that what old people need is not only the material supporting from their children but also the humanistic concern and love.
Today young people have been suffering the ever-increasing pressure. In the job market, they face more competition from new college graduates. In the family, they have financial pressure to support their parents and children. Besides, many young people want to fulfill what they dreamed and desperately overworked trying to achieve their goals. As a result, they have overlooked many things in their life such as their parents who can only live alone with nobody to talk with. It seems that young people have forgotten that paying respect for and taking care of the old people is their very responsibility.
Since each of us plays a different role under different circumstances, we have to learn to keep a balance among different roles. If we care about our parents, no matter how busy we are, we are definitely able to find time to company them. Even if we live far away from our parents, we can contact them by telephone or mail. There are various means for us to show our concern and love to our parents.
Now there is a call for young people to take good care of their elderly, which is a merit well-extolled in some Chinese-speaking countries and regions such as Singapore, Korea and Taiwan. The elder’s today is your future. E0 give your parents more concern and love and it can make you happier.

八进制数556转换为十六进制数是______。

A:146 B:166 C:16E D:18E

556 扑救固体爆炸品引起的火灾时，最有效的方法是

A:用砂土掩盖，窒息灭火 B:用水冲洒，降温灭火 C:使用泡沫或 CO2灭火 D:A、B、C都正确