问题 选择题

下列反应既是离子反应又是氧化还原反应的是(   )

A.大理石与稀盐酸 

B.硝酸银溶液与氯化钠溶液 

C.锌粒与稀盐酸 

D.碳与水蒸气

答案

答案:C

题目分析:有离子参加或生成的反应是离子反应,凡是有元素化合价升降的反应都是氧化还原反应。A、B是离子反应,但不是氧化还原反应;D是氧化还原反应,但不是离子反应,答案选C。

点评:该题是中等难度的试题,试题注重基础,主要是考查学生对离子反应和氧化还原反应理解掌握情况,有助于培养学生灵活运用基础知识解决实际问题的能力。该题的关键是明确有关的概念和含义。

单项选择题
阅读理解

With eco-tourism on the rise, eco-hotels are fast becoming the darling of the travel industry. These days, however, staying at an eco-hotel doesn’t necessarily mean vacationing in a tree house in the Costa Rican jungle, although that is certainly a choice.

The majority of eco-hotels fall into one of several categories: hotels and resorts that conserve ecologically important habitats; “green” hotels that reduce, recycle, minimize waste, and protect water; sustainable hotels that harvest food from gardens on the hotel property or get part or all of their power from renewable energy; hotels that encourage community involvement such as guests taking part in trail clearing; and hotels that offer some form of environmental education to their guests.

As such, eco-hotels are a various group. Stylish urban hotels like the Willard Inter-Continental Washington focus on energy conservation whereas the Rosario Resort & Spa on Orcas Island in Washington State offers a wildly popular “green” vacation package where guests can “take a hike, clear a trail”.

No matter what you call them, eco-hotel, eco-lodge, eco-resort, or green hotel, they’re all part of the “greening” of the tourism industry.

Part of what drives this greening of the hotel industry is no doubt competition. Going green is yet another way to distinguish a hotel from the mass of other excellent hotels that consumers have to choose from. But for many hotels, it’s also part of their philosophy. With the concept of “going green” firmly rooted in consumers’ minds, eco-hotels have taken it to the next level, and whether or not money is the driving factor behind the greening of the hotel industry doesn’t matter so much as it’s good for the planet.

小题1:The underlined part in the first paragraph means _______.

A.lovers like staying at an eco-hotel when traveling

B.eco-hotels are very popular in the travel industry

C.eco-hotels are where young people love to live

D.romantic love stories often happen in eco-hotels小题2: According to the passage, which of the following can match the idea of eco-hotel?

A.It uses renewable energy.

B.It is comfortable and fashionable.

C.It has walls of glass.

D.It is home to endangered species.小题3: From the passage, we know the Rosario Resort & Spa is a kind of hotel that _______.

A.protects important habitats

B.harvests food from its own garden

C.has courses on the environment for its guests

D.encourages its guests to participate in its greening activities小题4: From the last paragraph, we can learn that _______.

A.money is the driving force behind eco-hotels

B.eco-hotels have no advantages in competing for guests

C.eco-hotels teach their guests the philosophy of eco-hotels

D.the hotel industry cares more about money than the environment小题5: People who choose to stay at eco-hotels _______.

A.love to take a hike

B.have environmental awareness

C.want to live comfortably

D.enjoy the green atmosphere