问题 多项选择题 X型题

下列符合硅沉着病的描述是()

A.早期形成细胞性硅结节

B.晚期形成纤维性硅结节

C.胸膜纤维化

D.肺门淋巴结硅结节形成最早

E.硅结节中央部常发生坏死和钙化

答案

参考答案:A, B, C, D

解析:硅沉着病的基本病变是肺组织内硅结节形成和肺弥漫性间质纤维化。硅结节是硅沉着病的特征性病变。早期硅结节由吞噬硅尘的巨噬细胞局灶性聚积而成,多位于胂小动脉周围,为细胞性硅结节,随后结节发生纤维化和玻璃样变,成为玻璃样硅结节。根据硅沉着病病变程度和范围可将硅沉着病分为三期:Ⅰ期硅沉着病:硅结节主要局限于淋巴系统。两侧肺门淋巴结肿大,淋巴结内见硅结节形成。近肺门处肺组织及胸膜上也可有硅结节形成。Ⅱ期硅沉着病:硅结节数量增多,体积增大,散布于全肺,但仍以肺门周围中、下肺叶较密集,总的病变范围不超过全肺的1/3。胸膜增厚。Ⅲ期硅沉着病:两肺内硅结节密集且相互融合成块。团块状结节的中央可有硅沉着病空洞形成,病变范围超过全肺的2/3。硅结节间肺组织有明显的肺气肿改变。

单项选择题
完形填空
At one point or 36 in life, we are all 37 to make a speech to an audience on different occasions, for example, in the classroom to share successful 38 with classmates or on a wedding to send your best wishes in honor of the newly-weds. No matter 39 the audience seems to be, we are in public speaking. 40, most of us don’t do a very satisfactory job. We get nervous. We forget what to say, we 41 unnecessary words, and we 42 the audience. We feel awful, feeling like completely a loser, and wish we would never have to speak  again.
Cheer up! You are not alone and things are not 43 bad. Here are a few44 for you to 45 the pain. First, be clear about the purpose of your speech. What is the 46? Why are you speaking? Then, gather as much information 47 you can think of on your subject. It is advised that onespend plenty of your time doing some research and organizing your material so that your speech is clear and crystal. 48 many examples, pictures, charts, and graphs if possible. Most importantly, never forget your audience. Don’t talk over their heads, and don’t 49 them. Treat them with 50.During the course, let your 51 come through so that they feel as if you make person-to-person communication with them. They will surely 52 your thoughtfulness and find your speech enjoyable.
Just remember: Be prepared. Know your subject, the occasion, and the audience . If you follow these steps, you will see you don’t have to be 53.   54, you may find you more than enjoy the period and that you 55 to make more and long speeches. But don’t hog the podium and steal the show!
小题1:
A.other B.others C.another D.the other
小题2:
A.called in B.called upon C.called out D.called off
小题3:
A.storiesB.materials C.experience D.information
小题4:
A.how large B.what big size C.how much D.how many
小题5:
A.HoweverB.Therefore C.But D.As a result
小题6:
A.missB.avoid C.hateD.repeat
小题7:
A.amazeB.bore C.amuseD.embarrass
小题8:
A.that B.too much C.much too D.far from
小题9:
A.advicesB.tips C.suggestion D.words
小题10:
A.get across B.go throughC.get over D.go over
小题11:
A.situation B.condition C.occasionD.instruction
小题12:
A.which B.for which C.as D.that
小题13:
A.IncludeB.IncludingC.Give D.Showing
小题14:
A.talk aloud with B.talk down toC.Talk about D.talk to
小题15:
A.honor B.respect C.discipline D.encouragement
小题16:
A.personalityB.pointsC.speech D.opinions
小题17:
A.enjoyB.appreciate C.thank D.express
小题18:
A.frightened B.afraidC.enthusiastic D.relaxed
小题19:
A.However B.In fact C.In other words D.similarly
小题20:
A.are anxiousB.look forwardC.volunteerD.willing