试题与答案

在定制Swing Applet的绘图功能时,不能直接改变相应Swing构件的pain

题型:填空题

题目:

在定制Swing Applet的绘图功能时,不能直接改变相应Swing构件的paint( )方法,而应该使用【 】方法。

答案:

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题型:推断题

A是用途最广的金属,B、C是两种常见气体单质,E溶液为常见强酸,D溶液中滴加KSCN溶液显红色,它们相互转化关系如图所示。

请回答

(1)写出B物质的化学式:____________;F的名称:____________。

(2)写出第③步反应的化学方程式为______________________________。

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(4)写出SO2和B反应的离子方程式________________________。

(5)F溶液中滴入NaOH溶液可能产生的实验现象是________________________。

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题型:单项选择题


Directions: There are 10 blanks in the following passage. For each numbered blank, there are four choices marked A, B, C and D. Choose the best one and mark your answer on the ANSWER SHEET with a single line through the center.

Our planet is like a bit spaceship. Our atmosphere acts (51) a shield against harmful radiation and space debris. (52) holds the air and people on the spaceship, (53) everything doesn’t float away. Each of us is an astronaut and our spaceship, the earth, provides our food and water. The sun is our energy (54) and without it we would not be able to survive.
(55) every spaceship, the earth is a closed system. The only thing we receive from the outside is energy from the sun. Everything else must be used (56) again. We astronauts don’t seem to realize that this spaceship is the (57) one we’ve got. We (58) its resources and waste the energy the plants have stored from the sun. If we (59) our spaceship, we will destroy ourselves as well. Maybe if we look at the universe which surrounds us, we will appreciate our own spaceship more and take (60) care of it.

A.Granite

B.Gravity

C.Gratitude

D.Grace

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