[单选题]_______ is the main source of lift.
A.The difference in pressure between the upper and lower surfaces of the wing
B.The difference in curvature between the upper and lower surfaces of the wing
C.The curvature on the upper portion of the wing
D.The curvature on the lower portion of the wing

[单项选择]It can be inferred that' the main source of men's resistance to women's liberation is the feeling that ______.


A. women are now better educated
B. women can now hold executive positions
C. men are no longer indispensable
D. men are no longer superior

[单选题]下面是一台路由器的部分配置，关于该部分配置描述正确的 是:acl number 2001 rule 0 permit source 1.1.1.10 rule 1 deny source 1.1.1.0 0 rule 2 permit source 1.1.0.0 0.0.255.255 rule 3 deny
A.源地址为 1.1.1.1 的数据包匹配第条 ACL 语句 rule0,匹配规则为允许
B.源地址为 1.1.1.2 的数据包匹配第一条 ACL 语句 rule1,匹配规则为允许
C.源地址为 1.1.1.3 的数据包匹配第一条 ACL 语句 rule2,匹配规则为拒绝
D.源地址为 1.1.1.4 的数据包匹配第一条 ACL 语句 rule3,匹配规则为允许

[单项选择]

The API changes should provide both source and binary (71)for programs written to the original API. That is, existing program binaries should continue to operate when run on a system supporting the new API, In addition, existing (72) that are re-compiled and run on a system supporting the new API should continue to operate. Simply put, the API(73) for multicast receivers that specify source filters should not break existing programs, The changes to the API should be as small as possible in order to simplify the task of converting existing (74)receiver applications to use source filters. Applications should be able to detect when the new(75)filter APls are unavailable(e.g., calls fail with the ENOTSUPP error) and react gracefully(e.g., revert to old non-source-filter API or display a meaningful error message to the user).

空白处（71）应选择（）
A. capability
B. compatibility
C. labiality
D. reliability

[单项选择]Paper industry needed a new source of fiber in the early 1800s is because ______.


A. people wanted higher quality paper
B. paper made from rags deteriorated too quickly
C. wood pulp had become too expensive
D. the supply of rags was insufficient

[单项选择]Which is NOT described as a source of the problems facing the 1970s' Yugoslavia


A. Lack of regional cooperation.
B. Religious conflicts.
C. Competition for resources.
D. Discrimination against ethnic minorities.

[单项选择]Trial and error are the source of our knowledge.


A. is
B. were
C. has
D. have been

[单项选择]The fact that magic is a frequent source of words of phrase suggests that people ______.


A. lack linguistic originality
B. have always been interested in magic
C. are becoming more superstitious
D. are interested in magic when young

[单项选择]The main idea of the passage is


A. how many gifted children turned successful when they grew up.
B. That bright children were unlikely to be physically and mentally healthy.
C. That gifted children were most likely to become bright grown—ups.
D. That when the bright children grew up, they would become ordinary.

[单选题]左侧SOURCE OFF灯点亮表明：
A.交流转换汇流条1失电；
B.交流转换汇流条1失电后由交流转换汇流条2向交流转换汇流条1供电；
C.交流备用汇流条失电；
D.以上都对；

[单项选择]The source, who spoke on condition of anonymity, ______ to discuss the implication of that conclusion.
A. receded
B. implied
C. complied
D. declined

[单项选择]What is the main topic of the passage

[单项选择]According to the fossil reconstruction, what main parts did a tree comprise


A. It comprised a trunk, vertical ridges and palms.
B. It comprised leaves, ferns and palms.
C. It comprised stumps, branches and palms.
D. It comprised a base, a trunk and a crown.

[单项选择]What is the main idea of this passage


A. Obesity is now a global problem that needs tackling.
B. The weights increase fast throughout the whole world.
C. What results in the obesity in the poor world
D. Obesity has shifted from the rich world to the poor world.