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问题 单项选择题

为了增加传热面积，裂解炉炉管的形式多种多样。下列裂解工艺中，采用了椭圆型炉管的是（）。

A．凯洛格裂解法

B．三菱油化裂解法

C．福斯特—惠勒裂解法

D．西拉斯裂解法

答案

参考答案：B

选择题

《全球通史》写道：“当凡尔赛的调停人没有将这个丢失的省份归还给中国时，在北京的学生与知识分子中间爆发了声势浩大的示威游行。……事实证明，这场运动是中国历史上民族感情最强烈、最普遍的表露。”这场运动的民族感情之所以如此强烈的深层次原因是[ ]

A．学生和知识分子接受了新文化运动洗礼

B．广大人民群众直接参与和推动

C．巴黎和会上中国的领土权益被日本攫取

D．俄国十月革命对中国革命的鼓舞
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单项选择题

The de facto standard application program interface （API）for TCP/IP applications is the "sockets" interface. Although this API was developed for （1）in the early 1980s. it has also been implemented on a wide variety of non-Unix systems. TCP/IP（2） written using the sockets API have in the past enjoyed a high degree of portability and we would like the same（3） with IPv6 applications. But changes are required to the sockets API to support IPv6 and this memo describes these changes. These include a new socket address structure to carry IPv6 （4）, new address conversion functions, and some new socket options. These extensions are designed to provide Access to the basic IPv6 features required by TCP and UDP applications, including multicasting, while introducing a minimum of change into the system and providing complete （5）for existing IPv4 applications.

（3）是（）

A.portability

B.availability

C.capability

D.reliability
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