从整体史观讲，新航路开辟后，世界各民族的历史逐渐融合为一部统一的人类历史。这种“

我国由        个民族组成，汉族人口占全国人口总数的         ％[ ]

A、50       90

B、55       85

C、56       92

D、100     80

Mr Smith knows a lot ______  Beijing Opera.        [ ]

A. at    

B. for    

C. about    

D. with

For each blank, choose the best answer from the four choices and write down on the answer sheet.

In (1) the strength of the carrier signal is varied to represent binary 1 or 0. (2) is a system that can map a name to an address and conversely an address to an name. (3) is a three -way handshaking authentication protocol that it’s packets are encapsulated in the point - to -point protocol. (4) is an approach that enables an ATM Switch to behave like a LAN switch. (5) is an guided media which is made of glass or plastic and transmits signals in the form of light.

1（）

A．FDM

B．DSK

C．FCK

D．ASK

课程的本体功能表现为（）

A．社会文化的再生产

B．培养人

C．传递文化

D．选择文化

直肠癌病人出血，粪便颜色为（）。

A.蓝绿色

B.紫色

C.红色

D.黄色

E.黑色