704-J/JA的最大用户是（）。

A:706-C B:201-E C:301-J/JA D:702-C

301-J/JA两台不能运行时，可通过（）维持生产。

A:增加103-J/JA转速 B:降低高调水温度 C:降低PIC-205 D:启动902-J向301-J/JA出口加水

系统开车时，301-J/JA小副线保持开度的意义在于（）。

A:保证301-J/JA在最低转速以上运行 B:防止该副线堵塞 C:保证物料停留时间. D:防止203-C结晶

302-J/JA的机械密封水由（）提供。

A:901-J/JA B:704-J/JA C:903-J/JA D:905-J/JA

705-J/JA的电流是（）。

A:100A B:120A C:136A

直角均质弯杆ABC，AB＝BC＝L，每段质量记作MAB、MBC，则弯杆对过A且垂直于图示平面的A轴的转动惯量JA为（）。

A:JA＝MABL2/3+MBCL2/3+MBCL2 B: C:JA＝MABL2/3+MBCL2+（MBCL2）/4 D:JA＝MABL2/3+MBCL2/12+5MBCL2/4

The exact year of Christ’s birth is not recorded, but the calendar began on the supposed date divides time into B.C. (before Christ) and A.D. (in the year of our Lord). Nor was the exact day of his birth known. For the first 300 years his birthday was celebrated on different days. It was not until the year 354 that December25^th was chosen.
Christmas music is loved by all who hear and sing it every year. Carols, bells, and merry music have been a part of Christmas for centuries. Every Christmas Eve the bells ring to call people to church services. The most famous sleigh bells in the world belong to Santa Claus.
Christmas is a family festival. In the United States, no distance seems too great if it enables one to join the family circle for the holiday. All schools close for two weeks, parents welcome home their children and grandchildren and often open their doors to friends and strangers.

A:on December 25^th B:on different days C:in December, 300 D:in the year of our Lord

Passage Three
Humanity is a new experiment on planet Earth. For most of its history, life on Earth was restricted to the sea. Living things began to populate the land slightly over 400 million years ago, and humans have existed for no more than 3 million years.
One way to represent the evolution of tire is to compress the 4.6-billion-year history of Earth into a 1-year-long film. In such a film, Earth forms as the film begins on January 1, and through all of January and February it cools and is cratered (变成坑状) and the first oceans form. But those oceans remain lifeless until sometime in March or early April, when the first living things develop. The 4-billion-year history of Precambrian (前赛武纪) evolution lasts until the film reaches mid-November, when primitive ocean life begins to evolve into complex organisms such as trilobites (三叶虫).
If we examine the land instead of the oceans, we find a lifeless waste. But once our film shows plant and animal life on the land, about November 28, evolution proceeds rapidly. Dinosaurs, for example, appear about December 12 and vanish by Christmas Eve, as mammals (哺乳动物) and birds flourish.
Throughout the 1-year-run of our film there are no humans, and even during the last days of the year as the mammals rise and dominate the landscape, there are no people. In the early evening of December 31, vaguely human forms move through the grasslands, and by late evening they begin making stone tools. The Stone Age lasts until about 11:45 pm, and the first signs of civilization, towns and cities, do not appear until 11: 54 pm. The Christian era begins only 14 seconds before the New Year, and the Declaration of Independence is signed with I second to spare.

A:die out on December 25 B:appear after December 25 C:die out on December 24 D:appear on December 24

Passage Three Humanity is a new experiment on planet Earth. For most of its history, life on Earth was restricted to the sea. Living things began to populate the land slightly over 400 million years ago, and humans have existed for no more than 3 million years. One way to represent the evolution of tire is to compress the 4.6-billion-year history of Earth into a 1-year-long film. In such a film, Earth forms as the film begins on January 1, and through all of January and February it cools and is cratered (变成坑状) and the first oceans form. But those oceans remain lifeless until sometime in March or early April, when the first living things develop. The 4-billion-year history of Precambrian (前赛武纪) evolution lasts until the film reaches mid-November, when primitive ocean life begins to evolve into complex organisms such as trilobites (三叶虫). If we examine the land instead of the oceans, we find a lifeless waste. But once our film shows plant and animal life on the land, about November 28, evolution proceeds rapidly. Dinosaurs, for example, appear about December 12 and vanish by Christmas Eve, as mammals (哺乳动物) and birds flourish. Throughout the 1-year-run of our film there are no humans, and even during the last days of the year as the mammals rise and dominate the landscape, there are no people. In the early evening of December 31, vaguely human forms move through the grasslands, and by late evening they begin making stone tools. The Stone Age lasts until about 11:45 pm, and the first signs of civilization, towns and cities, do not appear until 11: 54 pm. The Christian era begins only 14 seconds before the New Year, and the Declaration of Independence is signed with I second to spare.

A:die out on December 25 B:appear after December 25 C:die out on December 24 D:appear on December 24