常见的电路元件有电阻元件、电容元件、()、电压源、电流源。 A.动力元件 B.电感元

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问题:

常见的电路元件有电阻元件、电容元件、()、电压源、电流源。

A.动力元件

B.电感元件

C.执行元件

D.发光元件

考点:地铁安全知识竞赛南京宁天线乘务知识南京宁天线乘务知识题库
题型:单项选择题

在等比数列{an}中,已知a1+a2+…+an=2n-1,则a12+a22+…+an2=______.

题型:单项选择题

— What did you do yesterday?

— We had great fun            in the park. [ ]

A. plays

B. played

C. playing

D. to play

题型:单项选择题

   Alice was beginning to get very tired of sitting by her sister on the bank, and of having nothing to do; once or twice she had looked into the book her sister was reading, but it had no pictures or conversations in it, “and what is the use of the book,” thought Alice, “without pictures and conversations?”

So she was considering in her own mind whether the pleasure of making a daisy-chain(雏菊花环) would be worth the trouble of getting up and picking the daisies, when suddenly a white rabbit with pink eyes ran close by her.

There was nothing so very remarkable in that; but when the rabbit actually took a watch out of its waistcoat-pocket, and looked at it, and then hurried on, Alice started to her feet, for it flashed across her mind that she had never before seen a rabbit with either a waistcoat-pocket, or a watch to take out of it, and burning with curiosity, she ran across the field after it, and fortunately was just in time to see it pop down a large rabbit- hole under the bush.

The rabbit-hole went straight on like a tunnel for some way, and then dipped suddenly down, so suddenly that Alice had not a moment to think about stopping herself before she found herself falling down a very deep well.

Down, down, down. Would the fall never come to an end? “I wonder how many miles I’ve fallen by this time?” she said aloud. “I must be getting somewhere near the centre of the earth. Let me see: that would be four thousand miles down, I think. I wonder if I shall fall right through the earth! How funny it’ll seem to come out among the people that walk with their heads downward! The Antipathies, I think—but I shall have to ask them what the name of the country is, you know. ‘Please, Ma’am, is this New Zealand or Australia?’ And what an ignorant little girl she’ll think me for asking! No, it’ll never do to ask.”

Down, down, down. There was nothing else to do, when suddenly, thump! thump! Down she came upon a heap of sticks and dry leaves, and the fall was over.

小题1:What kind of books do you think will interest Alice most?

A.Books that her sister was reading.

B.Books without pictures or conversations.

C.Books about white rabbits.

D.Books with pictures and conversations.小题2:Which of the following is true?

A.Alice suddenly saw a white rabbit with a strange umbrella.

B.Alice managed to fall right through the earth.

C.Alice ran after the white rabbit across the field out of curiosity.

D.The people on the opposite side of the earth walk with their heads downward.小题3:Which is the right order of the story?

a. Alice jumped into a large hole.

b. A white rabbit ran close by her.

c. Alice sat by her sister, doing nothing.

d. She fell upon some sticks and dry leaves.

A.c-b-a-d

B.d-a-c-b

C.a-b -c-d

D.d-c-a -b小题4: From the passage, we can see Alice is a(n)________girl.

A.helpful and friendly

B.curious and imaginative

C.brave and curious

D.ignorant and pretty小题5: The following paragraph “In another moment down went Alice after it, never once considering how in the world she was to get out again.” can be put between_________.

A.Paragraphs 1 and 2

B.Paragraphs 2 and 3

C.Paragraphs 3 and 4

D.Paragraph 4 and 5

题型:单项选择题

下面程序的运行结果是( )。
#include<iostream.h>
void main()

int i=1;
while(i<=8)
if(++i%3!=2)continue;
else cout<<i;

A.25

B.36

C.258

D.369

题型:单项选择题

决定糖尿病患者胰岛素用量的依据,错误的是()

A.年龄与性别

B.血糖水平

C.胰岛素抵抗程度

D.饮食情况

E.运动情况

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