水稻的体细胞有24条染色体,其连锁群数为()。

题型:填空题

问题:

水稻的体细胞有24条染色体,其连锁群数为()。

考点:生物学遗传学遗传学题库
题型:填空题

Enter键是( )。

A.输入键

B.回车换行键

C.空格键

D.换档键

题型:填空题

The Louvre Museum is one of the largest, oldest, most important and famous museum in the world. It is famous for holding several of the world’s most valuable works of art. Its collections’ number is over 380,000 objects, though not one of the world’s largest collections, arguably one of the finest. The art treasures of the Louvre Museum cover 5,000 years and are displayed in over 10 kilometers of galleries. The oldest artifact in the museum is 9,000 years old. Mona Lisa(1503-1506), painted by the Italian artist Leonardo da Vinci. The artist’s use of very deep space in the background with a half-length portrait is typical of Renaissance painting style. This painting hangs in the Louvre, Paris. It is one of the most famous collections in the Louvre.

On November 8th, 1793, the Louvre was opened as a public museum.

It is open from 9 am to 6 pm all days except Tuesdays. The entrance fee is 7.5 before 3 pm. It is free under 18 years old. The Louvre Museum in Paris had a record number of visitors in 2005. About 7.3 million people visited the art museum in 2005.

小题1: After reading the first paragraph, we can come to the conclusion that ____.

A.The Louvre Museum is the only largest, oldest, most important and famous museum in the world

B.The Louvre Museum has the world’s largest collections

C.The oldest artifact is over 9,000 years old

D.The Louvre Museum is priceless小题2:Which of the following statements is true?

A.Mona Lisa is typical of Renaissance painting.

B.Mona Lisa is painted by a Canadian.

C.Light space in the background is used in Mona Lisa.

D.All the above.小题3: Which of the following statements leads us to the conclusion that The Louvre Museum is popular?

A.The art treasures of the Louvre Museum cover 5,000 years.

B.It is famous for holding several of the world’s most valuable works of art.

C.The Louvre Museum in Paris had a record number of visitors in 2005.

D.The entrance fee is 7.5 before 3 pm.

题型:填空题

在光滑水平面上有一质量m=1.0×10-3kg,电量q=1.0×10-10C的带正电小球静止在O点,以O点为原点,在该水平面内建立直角坐标系Oxy,现突然加一沿x轴正方向,场强大小E=2.0×106V/m的匀强电场,使小球开始运动经过1.0s,所加电场突然变为沿y轴正方向,场强大小仍为E=2.0×106V/m的匀强电场再经过1.0s,所加电场又突然变为另一个匀强电场,使小球在此电场作用下经1.0s速度变为零.求此电场的方向及速度变为零时小球的位置.

题型:填空题

下列属于α-受体阻断剂的药物是()。

A.多巴胺

B.硝酸甘油

C.山莨菪碱

D.酚妥拉明

E.去甲肾上腺素

题型:填空题

您是宏远公司行政秘书高叶,下面是行政经理苏明需要您完成的任务。

便条

高叶:
公司因业务发展,新招聘了一位办公室秘书,安排其负责公司商务文书运转工作。请你概括商务文书工作的主要内容,并于今天下午14:00在二楼小会议厅向其介绍。
谢谢。
                           行政经理苏明
                            2007年4月15日

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