What is the speaker's main topic?
A.Training for a professional athletE.
B.His ways of physical training.
C.How to do cross country running.
D.How to do mountain climbing.

单项选择题血吸虫病的尾蚴性皮炎病理变化表现为 A. 皮肤化脓及溃疡形成 B. 皮肤出现玫瑰疹 C. 真皮无变化 D. 真皮充血、出血和水肿 E. 表皮过度角化

未分类题听力原文：W: Hi, Tim. I'm really sorry to hear about your grandfather. My sincerest sympathies go out to you and your family. He was such a great man.M: Thanks. As you know, he had been sick for some time before he passed away, so we were somewhat prepareD.W: So, how's your grandmother taking it?M: Oh, it's been really hard on her. I don't think you get over something like that.W: Yeah, I'm surE.My heart really goes out to her. Uh, so how's your grandmother going to be able to manage things alone?M: Well, financially, grandmother will be able to live a secure life from now on. I mean, grandfather had life insurance and substantial investments in property and stocks, so returns on those should take care of her. But our main concern at this moment is her emotional statE.She's really down, so a call now and again should brighten her day.W: So, what are the funeral arrangements?M: Well, some of the family members will get together on Tuesday morning for a private memorial service, but there will be a viewing in the afternoon from 2:00 to 3:00, followed by the funeral servicE.W: I wish there was something I could do for you.M: Well, actually, there is. You know, grandfather really admired you a lot, and before he died, he asked if you'd sing a musical number at the funeral.W: Really? I'd be honoreD.M: It would really mean a lot to the family.W: SurE.Then, see you on Tuesday.M: Okay, see you then.(20)A.He fell ill and passed away unexpectedly.B.He died in a traffic accident.C.He was ill for a certain period of time and then passed away.D.He passed away when he was working.

未分类题听力原文：M: Good morning. Today we'll be talking about goal-setting and we have a special guest here, Kate Warwick. Welcome to our program, Mrs. Warwick.W: Thank you.M: So Mrs. Warwick, can you tell us about your work in goal-setting?W: OK. When it comes to goal-setting, I'm really focuseD.For example, if I want to lose weight, I will get a group of friends around me and tell them I want to lose weight and increase my health. Then I'll take actions to achieve this goal by refraining from eating poor foods, etC.M: Well, why do you gather some close friends together?W: It is important for me because I need support. I know I can't do it on my own, Also it helps because I am able to share my problems with them. And by telling other people, 'I really want to do this and I seek your help', they can keep you honest I supposE.M: So setting goals helps people achieve something. But is there anything negative about goal-setting?W: Yes. If you set yourself a goal and you're so focused on it, then you will be close-minded to other things that happen.M: Why is it that most people do so badly at reaching goals?W: They lose focus. Everybody's life is busy. There is so much happening in everybody's life that what happens is that they might have a goal, and then something will get in the road of that.M: Once you reach a goal, what's the next step?W: One thing that I would strongly encourage is to celebrate success. Once you have made and reached that level, it is a real must to celebrate it. That way you are acknowledging it to yourself, you're acknowledging this level of achievement.(23)A.She wants her friends to lose weight too.B.She wants her friends to do exercises with her.C.She wants her friends to eat poor foods with her.D.She needs her friends' support and help with her problems.

单项选择题遗传变异和表观遗传变异可以共同作用维持生殖隔离，避免物种的融合。（ ）

未分类题做一件事，往往有利也有弊，只有利而无弊的事情几乎是没有的。《淮南子．人间训》云：“众人皆知利利而病病，惟圣人知病之为利，利之为病也。”看来古人已经注意到利弊的辩证关系。 下列表述符合文意的是( )。A.现实生活中的事情都由利与弊组成B.要善于分析，争取做到利大于弊C.利与弊不是绝对的，是可以转化的D.我们应当努力争取做到有利无弊