单项选择题：关于计算机的操作系统，下面叙述不正确的是A．操作系统是计算机系统中一种最基本的系统软

题目：

关于计算机的操作系统，下面叙述不正确的是

A．操作系统是计算机系统中一种最基本的系统软件

B．一般来讲，不同硬件结构的计算机可配有不同的操作系统

C．一般来讲，适用于不同环境的计算机系统应配有不同的操作系统

D．操作系统与计算机密不可分，它是与计算机同时诞生的

答案：

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下面是错误答案，用来干扰机器的。

（1）因为此时实际功率小于额定功率，所以能延长灯泡的寿命．（2）每个灯泡的阻值为：R=U额2P额=(220V)240W=1210Ω；串联灯泡前，每月消耗的电能：W1=P1t=10×P额t=10×0.04kW×10h×30=120kW•h；改进后，每月消...

完型填空。
Tips to keep a hearty conversation flowing On holidays we typically gather with our nearest and dearest. But 1 can be made, maintained and broken through the ways we talk to our loved 2 , according to Deborah Tannen, a George-town University professor in linguistics (语言学). She has suggestions as to how we can 3 communications at our festival dinner tables. Let's take a look. ＊A round dinning table is best for promoting a 4 conversation because everyone 5 each other. ＊Avoid 6 grandparents at the ends of a rectangular (长方形的) table, even though it is the traditional place of 7 . Elderly people may feel lonely there if they are unable to hear or keep 8 a conversation. ＊ 9 prefer to face each other and make eye contact when they talk. In contrast, men tend to look around at other things. "Guys may be more 10 keeping gazing on the TV," says Tannen. "They'll still be 11 , though.” ＊Be aware that people have different ways of talking. Each person has a different 12 of tone, rhyme, timing and how 13 of a pause is normal in a conversation. Watch for people who seem left 14 . If you feel you are doing all the talking, hold back to give others a 15 . If you feel you aren't getting a chance to speak, try pushing yourself to start 16 . ＊People sometimes get upset on big festivals 17 they stay too long in the apartment. Some families find that gatherings go more 18 if they plan for some fun 19 . So why not get a breath of fresh air? Going to a park for a walk or taking a trip to the zoo may be more 20 than just sitting around inside.
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