无性生殖原理被广泛的应用于生产实践中,这是因为无性生殖能 [ ] A.使后代具备

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问题:

无性生殖原理被广泛的应用于生产实践中,这是因为无性生殖能 [ ]

A.使后代具备两个亲本的遗传性

B.保持亲本的性状

C.使后代具有更大的生活力和变异性

D.明显增加作物的产量

考点:有性生殖和无性生殖
题型:选择题

命题“有两边相等的三角形是等腰三角形”它的题设是______,结论是______,它的逆命题是______.

题型:选择题

辨用法。

果然 诚然

①我来了,________应了我的话了。

②文章流畅________很好,但主要的还在于内容。

题型:选择题

下列关于电子邮件的不正确叙述是()

A.电子邮件是Internet提供的一种信息浏览服务

B.用户可以通过一台联入Internet的计算机向世界任何地方的用户改善电子邮件

C.电子邮件具有快速、高效、方便、廉价的特点

D.电子邮件既可以传输文本,也可以传输声音、图像、视频等多媒体信息

题型:选择题

阅读理解

     Much as Robby tried, he lacked the sense of tone and basic rhythm (节奏). But he dutifully

reviewed his lessons. Over the months he tried and tried, and often repeated to me "My mom's

going to hear me play some day."

    But he seemed hopeless, with no born ability. A real bad advertisement for my teaching! I was

so happy when one day he stopped coming.

    Several weeks later my students were to have a recital (演奏会). To my surprise, Robby came,

asking to play in the recital.

     "But, it is for current pupils; you dropped."

     "My mom was sick. But I have been practicing. I've just got to play!"

    I didn't know what led me to agree, maybe...

    The recital came. I__put__Robby__up__last__to__play__before__my__"curtain__closer", by

which, I could save the recital if...

    The recital went on well.  Robby came up on stage, clothes wrinkled and his hair looked like

he'd run an eggbeater through it. "How could his mom...?"

     Robby pulled out the piano bench and began. It was Mozart's work! I was not prepared for

what I heard next. Like in a dream, I was then woken up by the wild applause-everybody was on

their feet!

     "I've never heard you play like that, Robby! How'd you do it?"

    Through the microphone Robby explained: "Well, Miss Hondorf, remember I told you my mom

was sick? Actually she had cancer and died this morning. She was born deaf, and tonight was the

first time she ever heard me play. I wanted to make it special."

     My eyes were wet. He was not a student of mine, but a teacher!

1. We can infer from the underlined sentence that the writer ________.

A. was fully confident that Robby would perform well in the recital

B. thought that Robby would make the recital special

C. thought that Robby wouldn't play in the recital

D. had no confidence in Robby at all in the recital

2. What made the boy succeed in the recital?

A. Love for his mother.    

B. Musical talent.

C. The writer's help.      

D. Regular practice.

3. What made the writer think that Robby was her teacher, not a student?

A. That he played better than her in the recital.

B. That he loved his mother more than she did.

C. That he never gave up.

D. That the audience gave him more applause than her.

4. What is the highlight of the recital?

A  The writer's performance.

B. Robby's performance.

C. Robby and his mom's story.

D. The audience's applause.

题型:选择题

上呼吸道感染治疗原则不正确的是()

A.一般治疗:休息多喝水

B.注意呼吸道隔离

C.预防并发症

D.对症治疗:高热给予退热治疗,高热抽搐,给予镇静、止惊等处理

E.早期积极使用抗生素

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