水泥抽取试样要有代表性，抽取部分不能太少，若是袋装水泥，在同一批水泥中，要至少从多少

下列句子中，没有错别字的一项是[ ]

A．在持续不断的、倦意叠生的忙碌时，我常常望着书房里那一撂撂的书，充满了对天堂的向往。有了这种向往之后，我所身处的境地便有了地狱一般的对比效果。

B．至于地势，伸之则为半岛，缩之则为港湾，聚之则为峰峦，散之则为洲屿，加上舟揖来去，变化之多，乃使海景奇幻无穷。我看了十年，仍然馋目未餍。

C．午后的阳光照在酢浆草的花盏上，有着一种蓬勃的美丽。我的心地也因为天堂和酢浆草的双重润泽而黑亮和妖饶。而我们曾经用心经营的三角梅，倒是敛抑着，萧疏着。

D．是的，这里看不到宽阔的地平线，目及的只是各种各样菱角分明的线条：这里的月亮在初升起时常常是黄黄的，似乎在什么化学溶液里浸泡过。

下列各组离子中，能在溶液中大量共存的是

A．Mg²⁺、K⁺、Cl^-、OH^-

B．Na⁺、Ba²⁺、CO₃^2-、NO₃^-

C．Na⁺、H⁺、Cl^-、CO₃^2-

D．K⁺、NO₃^-、Cu²⁺、SO₄^2-

以下一些作法：

（1）用手同时接触一节干电池的正负极；

（2）站在地上用手碰到了家庭电路中的火线；

（3）用湿抹布揩亮着的电灯；

（4）站在干燥的木板上单独碰到了家庭电路中的任一根线；

（5）用正确的方法使用测电笔检测火线．

其中可能会发生触电事故的是（　　）

A．只有（2）（3）

B．只有（3）（4）

C．只有（2）（3）（4）

D．只有（1）（2）（4）

D

Doctor Seuss was born in 1904. By the middle 1950s, he had become one of the best-loved and most successful children’s book writers in the world. His books are very popular with young readers. They enjoy the invented words and the pictures of unusual funny animals and plants.
In 1954, Life magazine published(刊登) a report about school children who could not read. The report said many children’s books were not interesting. Doctor Seuss ply hoped to help children and decided to write books that were interesting and easy to read. He used words with the same ending sound, like fish and wish. He did not receive training in art. Yet, he drew the pictures for most of his books.
In 1957, Dr. Seuss wrote The Cat in the Hat. He used less than 230 words to write the book and even a six-year-old should be able to read it. It was a fun story and easy to read. Children loved it. Their parents loved it, too. Today it is still one of the stories they like best. The success of The Cat in the Hat made him want to write more books for children. In 1960, he wrote a book using less than fifty words. The book is called Green Eggs and Ham.
In 1984, Doctor Seuss won a Pulitzer Prize (普利策奖). He was honored for the education and enjoyment his books provided American children and their parents.
He died at the age of 87, but his influence remains. Millions of his books have been sold worldwide. People say his books helped change the way American children learned to read. Yet, his books are loved by people of all ages. Doctor Seuss once said. "I do not write for children. I write for people.\

From the text we know that Doctor Seuss ______.

A．won a Pulitzer Prize soon after his death

B．sold millions of his books himself worldwide

C．changed American children’s way of reading

D．wrote the largest number of books in the world

监控单元检测到蓄电池温度为10℃，那么此时给蓄电池充电的浮充电压为（）（温度补偿是以25℃为基准，以每节（2V）－3mV/℃进行调节）。

A、52.42V

B、53.50V

C、54.58V

D、56.40V