下列选项中说明氢气作为燃料的优点的是： ①氢气燃烧时发生氧化反应 ②氢气充分燃烧

阅读短文，并按要求完成下列句子。

      The Internet has changed our habits, including our habit of sending greeting cards. There are many

 e-card websites that make it so easy to find the right greeting cards. they have greatly changed the way

 we send greetings to each other.

     Our lives have become so busy that we have limited personal time.  These e-card websites have

 allowed everyone to easily share their feelings and emotions (感情) with the people they love. They

 contain (包括) plenty of greeting cards that can be used right away. The users can choose any card they

  like, from festival greetings to birthday wishes. In fact, e-cards are perfect for any event. That's why more

  and more people like to send e-cards.  If the users are interested in making their own greeting cards on

 the Internet, they can create a card within only a few minutes.

     We have never forgotten the importance of saying sorry to our beloved ones. But sometimes we fail to

  do so because we are not brave enough to face those we hurt. Some e-cards on these websites allow us

 to express our feelings in a more thoughtful way.

    Although some people still would rather buy traditional cards in the shop, especially when they want the

  cards to last a long time, more and more people are choosing to send greetings on the Internet.

1. The way we send greetings to each other has greatly changed because of the_____ websites.

2. With the help, of the greeting cards on the websites. people can _____ with others easily.

3. The users can _____ on the Internet within a few minutes if they are interested in it.

4. E-cards can help you to say _____ to those you hurt in a thoughtful way,

5. From the passage we know that e-cards are becoming more and more _____ .

_____ wealthy people with the business tax instead of the individual income tax weakens government efforts _____ the wealth gap.

A．Taxing, closing

B．Taxing, to close

C．Tax, to close

D．Having taxed, closing

李女士于1990年以95元的价格购入面值100、票面利率8%、期限为5年的债券，每年付息一次，3年后以98元卖出，则李女士的投资收益率为（）。

A．26.73%

B．27.32%

C．28.42%

D．29.43%

干燥率是（）。

下面关于商流与物流的表述中，正确的是（）。

A.两者必定同步进行

B.商流是物流的前提

C.物流是商流的前提

D.商流是物流的保证