经研究表明,光是一种电磁波,光波和一切波一样也具有波动性.在组成白光的七种单色光

题型:填空题

问题:

经研究表明,光是一种电磁波,光波和一切波一样也具有波动性.在组成白光的七种单色光中,红光波长最长、频率最低,紫光波长最短、频率最高.20世纪20年代,美国天文学家哈勃观察恒星光谱时,发现所有恒星原定的谱线都向红光一端发生明显的偏移,这就是著名的“哈勃红移”.通过以上描述可知我们观测到光的频率______(填增大或减小),说明各恒星在______(填远离或靠近)我们.

考点:电磁波
题型:填空题

阅读理解。

     Mary is a schoolgirl. The day before yesterday (前天) was Saturday. Her parents were very busy, but

she had nothing to do. So she wanted to cook lunch for herself.

     She didn't cook before, so it was difficult for her. She couldn't cook vegetables or meat. She thought for

a long time, and finally she had an idea. First, she cooked some rice. When the rice was OK, she put it into a

big bowl. Next, she took out three eggs from the fridge. She beat up (打碎) the eggs, poured some oil (油)

into the pan (煎锅) and put the eggs into the pan. And then she put the rice into the pan. Next she put some

salt and a teaspoon of relish. She mixed them up and cooked them. She finished her dinner. How happy she

felt!

1. What day was yesterday?

A. Thursday.

B. Friday.

C. Sunday.

2. What did Mary want to do?

A. Do her homework.

B. Cook lunch.

C. Buy some eggs.

3. What did Mary cook for lunch?

A. Some rice and vegetables.

B. Some vegetables and meat.

C. Some rice and three eggs.

4. After finishing the lunch, how did Mary feel?

A. Free.

B. Happy.

C. Tired.

5. What should we learn from Mary?

A. We should often do some housework.

B. We must make dinner for the family.

C. We must do housework first.

题型:填空题

微型计算机读写控制信号的作用是 ( )

A.决定数据总线上的数据流方向

B.控制存储器操作的类型

C.控制流入、流出存储器信息的方向

D.以上都对

题型:填空题

某企业某年度取得应税利润600万元,销售收 3,1600万元,如果以应税利润为征税对象,采用超率累进税率形式(税率表如下),则该企业本年应纳税额为( )万元。

A.级数

B.销售利润表

C.税率

D.1

E.5%以下

F.0

F.2

F.5%~10%(含)

F.5%

F.3

F.10%~20%(含)

F.10%

F.4

F.20%~35%(含)

F.20%

F.5

F.35%以上

F.35%

题型:填空题

设函数fun的定义形式为:
vold fun (char ch, float x)……
则以下对函数fun的调用语句中,正确的是( )。

A.fun("abc",3.0);

B.t=fun('D',16.5);

C.fun('65',2.8);

D.fun(32,32);

题型:填空题

违法行为在2年内未被发现的,不再给予行政处罚。法律另有规定的除外。前款规定的期限,从违法行为()起计算。

A.发生之日

B.立案之日

C.查处之日

D.举报之日

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