问题 多项选择题

下列对直接胆红素的说法哪一项是错误的

A.为胆红素葡萄糖醛酸二酯

B.水溶性较大

C.不易透过生物膜

D.不能通过肾脏随尿排出

E.与重氮试剂起反应的速度快,呈直接反应

答案

参考答案:D

解析:[解释] 直接胆红素与重氮试剂反应速度快,呈直接反应所以称直接胆红素,它是胆红素与葡萄糖醛酸结合形成的胆红素葡萄糖醛酸二酯,又称结合胆红素。其分子中极性基团较多,故水溶性较大,不易穿透生物膜,但容易通过肾脏随尿排出。

多项选择题
阅读理解

In an age dominated (控制的) by new media and the Internet, there are so many alternative ways of learning.Gone are the days when, if we couldn't make it into a classroom, the only real option was to pick up a book, or when audio materials consisted of bad quality cassettes or sporadic(时有时无的) radio and TV programmes.With the appearance of broadband access to the web, we have a whole new learning domain (统领) at our fingertips.Sophisticated learning materials in the form of text or high-quality audio are now available at the touch of a button, and tests and assignments can be submitted (进行) and marked online.Questions and learning, studying away from the classroom has never seemed easier.Yet many teachers would argue that face-to-face contact between teachers and students is an essential part of the language learning experience.Enter the concept of blended (融合的) learning, an approach to education which seeks to combine the best of new technology and actual human contact.

Advocates of blended learning argue that an approach to study which combines the benefits of new technology with the best aspects of face-to-face (often abbreviated to F2F) teaching, will achieve better results.For example, there are some aspects of study, like practical sessions, dealing with more subjective questions, or meeting the needs of an individual student, which require face-to-face human interaction, whereas the more mechanical aspects of learning, such as answers to clear-cut questions, can be managed simply and effectively in a remote environment using new technology.

Blended learning approaches have proven especially appropriate in language learning.For example, in an ELT (English Language Teaching ) environment, a simple scenario (剧情概要) might be a classroom session where a teacher asks a group of students to use a wiki to create a text. Students then go away and compose and edit the text remotely.During the next F2F session, the teacher express his opinion about their work.

小题1:What is the main idea of this passage?

A.Blended learning is an effective learning approach.

B.More and more people will use Internet-based learning materials,

C.There are so many different ways of learning for people to choose in today's world.

D.Blended learning methods have proven to be effective except in language learning.小题2:Which of the following aspects of study doesn't require face-to-face interaction between teachers and students?

A.Practical sessions.

B.Tackling the needs of an individual student.

C.Dealing with more subjective questions.

D.Providing answers to clear-cut questions.小题3:It can be inferred from the passage that ______.

A.the radio and TV in the past were of poor quality

B.people do not get audio materials through cassettes nowadays

C.it was not convenient for people to leam outside a classroom in the past

D.it was difficult to find a classroom with good learning conditions in the old days小题4:Which of the following can be best describe the writer's attitude towards blended learning?

A.Critical.

B.Objective (客观的) .

C.Supportive.

D.Neutral (中立的) .