在PCM系统中,抽样频率()A.300hz B.500hz C.800hz D.80

题型:单项选择题

问题:

在PCM系统中,抽样频率()

A.300hz

B.500hz

C.800hz

D.8000hz

考点:通信工程师程控数字交换机程控数字交换机题库
题型:单项选择题

下列哪项是胃小弯溃疡合并出血的最佳手术方案()。

A.胃大部切除术

B.迷走神经干切断术

C.选择性胃迷走神经切断术

D.高选择性迷走神经切断术

E.迷走神经干切断术加胃幽门成形术

题型:单项选择题

水力清淤时,应该注意()。

A、在用水季节施行

B、按先下游后上游,分阶段进行

C、引入含沙量较少的清水

D、关闭一切闸门

题型:单项选择题

美国药典

A.中国药典
B.USP
C.BP
D.JP
E.Ph.Int.

题型:单项选择题

Paris is the capital of France, a country in the west of Europe. It is also one of the most beautiful and most famous cities in the world.

Paris is called the City of Light. It is also an international fashion center. What modern women are wearing in Paris will soon be worn by many women in other parts of the world. Paris is also a famous world center of education. For instance, the headquarters of UNESCO, the United Nations Educational, Scientific, and Cultural Organization, is in Paris.

The Seine River divides the city into two parts. Thirty-two bridges cross this scenic river. The oldest and perhaps most well-known is the Pont Neuf, which was built in the sixteenth century. The Sorbonne, a famous university, is located on the Left Bank (south side) of the river. The beautiful white church Sacre Coeur lies on top of the hill called Montmartre on the Right Bank (north bank) of the Seine.

There are many other famous places in Paris, such as the famous museum the Louvre as well as the cathedral of Notre Dame. However, the most famous landmark in this city must be the Eiffel Tower.

Paris is named after a group of people called the Parisii. They built a small village on an island in the middle of the Seine River about two thousand years ago. This island, called the le de la Cite, is where Notre Dame is located. Today around eight million people live in the Paris area.

小题1: The best title for the text would be ______.

A.The City of Paris

B.The French Language

C.Education and Culture in France

D.The Eiffel Tower, the Symbol of Paris小题2:The underlined word “headquarters” (paragraph 2) means _______.

A.buildings

B.research center

C.market

D.head office小题3:We can infer from the text that Notre Dame is located ______.

A.on the Right Bank

B.on the Left Bank

C.on neither bank

D.on both banks

题型:单项选择题

抗洪战士为了抢险抗洪长时间不吃饭、不休息,其体内激素含量变化的情况正确的一组是()

A.甲状腺激素增多,胰高血糖素减少

B.肾上腺素和促甲状腺激素均减少

C.胰高血糖素和抗利尿激素均增多

D.胰岛素和抗利尿激素均减少

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