原核细胞与真核细胞的不同,表现在()。A.原核细胞基因组的大小仅有真核生物基因组大小

题型:单项选择题

问题:

原核细胞与真核细胞的不同,表现在()。

A.原核细胞基因组的大小仅有真核生物基因组大小的一半

B.原核细胞具有单链的DNA分子

C.原核细胞中与DNA结合的蛋白质较少,而且没有核膜包裹

D.原核细胞具有RNA而不是DNA

考点:生物学分子生物学分子生物学题库
题型:单项选择题

为了提升物业租金收益,可采取的有效措施有()。

A.提升设备性能,提高了入住率

B.提高租金

C.限制污染环境的设备使用

D.减少租金拖欠

E.禁止耗能高的设备使用

题型:单项选择题

对缓慢型心律失常有防治作用的是()

A.氯化甲基多巴胺

B.去甲猪毛菜碱

C.去甲乌药碱

D.乌头碱

E.小檗碱

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患者男性,40岁,车工,近2个月来经常加班,劳动后引起腰背痛以及活动障碍,约5天前又扭伤腰部,疼痛加剧,且向右下肢放射,咳嗽、弯腰、排便时加重,脊髓造影显示腰4~5椎间盘水平偏右有一圆形压迹,最可能的诊断是()

A.慢性腰部劳损

B.强直性脊柱炎

C.腰肌肌筋膜炎

D.急性腰扭伤

E.腰椎间盘突出

题型:单项选择题

年龄别身高,可应用于儿童,可反映( )营养状况。

A.较长期

B.当前

C.较长期和当前

D.无法判断

题型:单项选择题

Like every language, American English is full of special expressions, phrases that come from the day-to-day life of the people and develop in their own way. Our expression today is "to face the music".
When someone says, "well, I guess I’ll have to face the music, " it does not mean he’s planning to go to the concert. It is something far less pleasant, like being called in by your boss to explain why you did this and did that, and why you didn’t do this or that. Sour music indeed, but it has to be faced. At sometime or another, every one of us has had to face the music, especially as children. We can all remember father’s angry voice, "I want to talk to you. " and only because we did not obey him. What an unpleasant business it was!
The phrase "to face the music" is familiar to every American, young and old. It is at least 100 years old. And where did this expression come from The first explanation comes from the American novelist, James Fenimore Looper. He said, in 1851, that the expression was first used by actors while waiting in the wings to go on the stage. When they got their cue to go on, they often said, "Well, it’s time to face the music. " And that was exactly what they did—facing the orchestra which was just below them. And an actor might be frightened or nervous as he moved on to the stage in front of an audience that might be friendly or perhaps hostile, especially if he forgot his lines. But he had to go out. If he did not, there would be no play. So the expression "to face the music" come to mean "having to go through something, no matter how unpleasant the experience might be, because you knew you had no choice".
Other explanations about the expression go back to the army. When the men faced an inspection by their leader, the soldiers would be worried about how well they looked. Was their equipment clean, shinny enough to pass the inspection Still the men had to go out and face the music of the band as well as the inspection. What else could they do
Another army explanation is more closely related to the idea of facing the results and accepting the responsibility for something that should not have been done. As, for example when a man is forced out of the army because he did something terrible, he is dishonored. The band does not play. Only the drums tap a sad, slow beat. The soldier is forced to leave, facing such music as it is and facing the back of his horse.

How many ways does the phrase "to face the music" comes from

A. 1

B. 2

C. 3

D. 4

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