丹丹在母亲节那天准备为妈妈送上一份惊喜,要在妈妈回来之前把饭做好,所需时间如下表

题型:填空题

问题:

丹丹在母亲节那天准备为妈妈送上一份惊喜,要在妈妈回来之前把饭做好,所需时间如下表:
洗米
4分钟
蒸饭
25分钟
择菜
5分钟
洗菜
6分钟
切菜
3分钟
炒菜
10分钟
(1)丹丹至少需要(    )分钟干完这些事情。
(2)如果妈妈17:00准时到家,丹丹最晚要在(    )时(    )分开始做这些准备工作。
考点:合理安排时间时间的计算
题型:填空题

阅读理解。

     There are few families in the United States that do not have either a radio or television set. Both of

them have become a necessary part of our daily life, keeping us filled with the news of the day, teaching

us in many fields of interest and making us happy with singing,dancing and acting?

     Marconi, the Italian inventor, who gave us the radio, probably didn't know how much his

great invention would have done for the world in the years to come. Radio had, perhaps done as much

as any other communication tool. Things of the world can be reported to people everywhere a few

seconds after they happen. Travelers in out-of-the-way places, ships at sea even astronauts round the

earth are able to keep in touch with each other by radio.

     Television is another important invention. It lets us see as well as hear the actor. Since its appearance,

TV has done a great deal in the daily life of people everywhere. Many programs are now televised in

color.

     Perhaps the most modem invention is"Telstar",a"star"moving round the earth. It makes it possible

for the people all over the world to be closer than ever before. Now a family in Chicago can watch on

TV a motor-car race in Italy , a table tennis competition in Beijing or a volleyball match in Japan as these

events are actually happening!

1.The passage tells us that______in the USA have no radio or television set.

A. a large number of homes

B. all the families

C. few families

D. quite a few homes

2.Why does the passage say the radio and TV have become a necessary part of our daily life?

A. Because they have touched nearly everything in our life.

B. Because men would not live happily without them.

C. Because they are the only ways to spread information.

D. Because no communication means no life.

3. What is the use of a "Telstar"according to the passage?

A. To receive and store information only?

B. To move around the earth just like the moon.

C. To give light onto the earth at night.

D. To help broadcast radio or TV information to the world.

4.Who do you think the writer of the passage is?

A. An Italian.

B. A Japanese.

C. An American.

D. A Chinese reporter.

5. When the writer introduces Marconi in the second paragraph, he means ______.

A. he was just an Italian inventor

B. his invention has done much for the world

C. he had reported much to people all over the world

D. he helped people travel a lot around the world

题型:填空题
从标有1、2、3、4的卡片中先后抽出两张卡片,则号码4“在第一次被抽到的概率”、“在第一次未被抽到而第二次被抽到的概率”、“在整个抽样过程中被抽到的概率”分别是(  )
A.
1
4
1
3
1
2
B.
1
4
1
3
1
4
C.
1
4
1
4
1
2
D.
1
4
1
2
1
2
题型:填空题

已知某两种物质在一定条件下发生化学反应,其微观示意图如下图所示,下列说法不正确的是

[ ]

A. 该反应中共涉及四种分子    

B. 该反应的反应物都是单质 

C. 该反应符合质量守恒定律   

D. 该反应中生成物都是化合物

题型:填空题

起下钻作业时,使用刮泥器是预防落物卡钻的措施之一。

题型:填空题

设置的围栏应醒目、牢固。禁止()围栏、接地线、安全标志牌及其他安全防护设施。

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