What is this lecture mainly about？

A . The command produces an error because the retention time cannot be reduced.  B . All historical data is retained but the subsequent flashback data archives are maintained for only three years.  C . All historical data is purged and the new flashback data archives are maintained for three years.  D . All historical data older than three years is purged from the flashback archive FLA1.&e

A．Why is the world tourism industry declining. B．How does the world economy influence the tourism industry. C．What is the development of the world tourism industry in the past 5 years. D．What are the factors that influence the world tourism industry.

A．An investment opportunity B．A completed project C．A sponsorship arrangement D．An environmental regulation

A．Men's way of buying things. B．Women's attitude towards shop assistants. C．The difference between men and women in buying things. D．Men are better in choosing what they will buy.

A．Industrial Revolution B．French Revolution. C．Chinese Revolution.

A．A recent show B．A film festival C．A live production D．An upcoming movie

A．What the man and the woman are going to do tomorrow night. B．The Star Wars movie tickets will be on sale tomorrow night. C．The man invites the woman for the opening premiere tomorrow. D．How to get the pre-sale movie tickets.

A．Burj Khalifa is an amazing building with many interesting features． B．Burj Khalifa is the tallest building in the worl D． C．Burj Khalifa opened to the public in 2010．

A．To point out similarities in Emerson"s essays and poems B．To prepare the students to read an essay by Emerson C．To compare Emerson"s concept of universal truth to that of other authors D．To show the influence of early United States society on Emerson"s writing 此题为多项选择题。

A．How to exploit nonrenewable mineral resources B．The exploitation of minerals in protected environments C．Pollution as a by-product of mineral exploitation D．The economic and environmental costs of exploiting minerals

A．The change in the policy of insurance. B．The independent insurance agency market. C．The development of an insurance company. D．The worries of an insurance customer.

A．Grooming may cause an enemy or predator to be confused. B．Grooming is a convenient and accessible behavior. C．Grooming often occurs before eating and drinking. D．Grooming is a common social activity. 此题为多项选择题。

A．Using the City Hall. B．Making telephone calls. C．The building services in town.

A．She records lectures. B．She takes notes. C．She asks questions.

A．The world's largest glaciers B．How glaciers are created C．The movement of glaciers D．Why glaciers are melting

A．The developmental deformities of the butterfly species. B．The migratory patterns of certain species of butterflies. C．The developmental stages of the butterfly species. D．The distinguishing anatomical features of caterpillars and butterflies.

A) One with no accompanying slides. B) One that is simply put online as text. C) One without video or audio. D) One with interaction during the lecture

—It might be a good idea to read some simplified books first.() 对 错

A．This article starts with a report on one of the beach protests which remains the part of nationwide grassroots protests against offshore drilling． B．Jane Barry was very efficient in organizing this 15-minute beach protest since the group could end up in some 200 people chanting their demand to stop offshore drilling． C．Dave Rauschkolb started this movement originally because of the BP oil spill and its severe consequences in the aftermath． D．The objective of this movement, according to Rauschkolb, is to persuade politicians involved into supporting the idea of not resorting to offshore drilling．