用所给词的适当形式填空。 1. By the time I got to the

题型:填空题

问题:

用所给词的适当形式填空。

1. By the time I got to the bus stop, the bus had already_____(leave).

2. They_____(make) a lot of friends since they came to our school.

3. She was so_____(embarrass) that he didn't know what to say at the moment.

4. They have been_____(marry) since eight years ago.

5. That's the_____(end) of the story.

6. The mice all______(flee) away when the cat appeared.

7. We_____(learn)eight units by the end of last week.

8. It is three years since he_____(leave)

9. My sister_____(watch) TV when I_____(get) home yesterday.

10. Keep quiet. Dad_____(listen) to the news now.

考点:实义动词的过去式名词形容词实义动词的过去分词过去进行时
题型:填空题

A、B、C、X均为中学常见的纯净物,它们之间有如图转化关系(副产物已略去)。

回答下列问题:

(1)若X是强氧化性单质,则A不可能是________。

a.S       b.N2         c.Na        d.Mg        e.Al

(2)若A、B、C为含金属元素的无机化合物,X为强电解质溶液,A溶液与C溶液反应生成B,则B的化学式为________,X的化学式可能为(写出不同类物质)________或________,反应①的离子方程式为________________________或________________________。

题型:填空题

在一定条件下,某密闭容器内,SO2氧化成SO3的热化学方程式为:2SO2(g)+O2(g)2SO3(g)△H =-a kJ·mol1。在相同条件下,要想得到2a kJ的热量,加入各物质的物质的量可能是(  )

A.4mol SO2和2mol O2

B.5mol SO2和3mol O2

C.4mol SO2和4mol O2

D.4mol SO2、2mol O2和2mol SO3

题型:填空题

β转角

题型:填空题

如图所示有一位错环,其中A点位错的性质为(),它可作的运动为(),B点位错的性质为(),它可作的运动为()。

 

题型:填空题

“里拉”曾经是哪个欧洲国家的货币单位名称?

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