在温度一定的情况下,关于两根粗细、长短都相同的铜导线和铝导线的电阻,下列几种说法

题型:选择题

问题:

在温度一定的情况下,关于两根粗细、长短都相同的铜导线和铝导线的电阻,下列几种说法中正确的是(  )

A.铜导线的电阻大

B.铝导线的电阻大

C.两种导线的电阻一样大

D.无法确定

考点:影响电阻大小的因素
题型:选择题

某钢铁冶炼厂工人,男性,在工作中因自觉头痛、头晕,口唇呈樱桃红色。被送至急诊室就诊,对诊断有重要意义的实验室检测项目是()

A.红细胞数量

B.血红蛋白含量

C.高铁血红蛋白含量

D.碳氧血红蛋白含量

E.氧合血红蛋白含量

题型:选择题

声音嘶哑的常见病因有:()

A.舌咽神经受损 

B.喉返神经受损 

C.喉上神经内支受损 

D.喉的炎症性疾病 

E.喉肿瘤

题型:选择题

D

At the railway stations all across Britain next week, groups of students will gather with their backpacks to wait for the trains that will carry them home for Christmas. This is a large movement of human beings as before, but with more contradictory traffic flows, so that trains filled with the young pass each other travelling in every direction.

At first, I went home every weekend with my washing, but then those visits became less regular. How did I let my parents know I was coming? They had no phone. Perhaps I wrote to them (“Expect me with dirty shirts this Friday afternoon”), but more likely I didn’t let them know, and just turned up or didn’t turn up, not understanding that my parents’ hopes of seeing me were a greater disappointment of my carelessness than a spoiled tea.

And in all this I suspect I was typical (有代表性的), at least of young men. As for our fathers and mothers, none of them talked of “empty-nest syndrome (综合症)”, even though its possible effect that the main human duty is to protect and feed the young would have suited their generation better than ours. Then, the feeling of loss went without a name. Today, it’s a condition with remedies, which will make parents feel more enjoyable in their life, The Mayo Clinic, for example, suggests you try to maintain regular contact with your children through “visits, phone calls, emails, texts or video chats”. If you feel unhappy, lean on (depend on … for support) loved ones or your mental health providers. Above all, stay positive: “Thinking about the extra time and energy that you might have to devote to your marriage or personal interests after your last child leaves home, it might help you adapt to this major life change.”

What can’t be denied, however, is that children often leave home. In modern societies, this is what they do. Christmas is the very time they can be depended on to return. For the non-religious, that may be this season’s true comfort and significance.

小题1:The main reason for the busy traffic across Britain next week is that _______.

A.young students will travel home for Christmas.

B.young people will travel in every direction.

C.it is a large movement of human beings

D.the traffic flows will be more contradictory小题2:From the second paragraph we can learn that the writer _______.

A.went home every week to wash dirty clothes

B.understood his parents’ desire of seeing him

C.didn’t understand his parents’ feelings

D.went home to see his parents regularly小题3:The underlined word “remedies” in paragraph 3 is closest in meaning to _______.

A.reasons

B.excuses

C.habits

D.solutions小题4:From the last paragraph we know that _______.

A.in modern society, children should leave home

B.Christmas is likely a time for family reunion

C.the significance of Christmas is celebration

D.Christmas is not a comfort for the non-religious小题5:From the passage we can infer that by writing the article the writer is to _______.

A.persuade the young to show concern for their parents

B.ask the young to go home regularly

C.make the young understand their parents’ interest

D.enable the young to be more independent

题型:选择题

在绿色植物体内,ADP转化为ATP时,所需能量来源于()

A.光合作用和呼吸作用

B.光合作用和渗透作用

C.呼吸作用和渗透作用

D.光合作用和蒸腾作用

题型:选择题

轴流泵当扬程减小时,将叶片安装角(),便达到经济运行之目的。

A、调小

B、调大

C、调平

D、偏转

更多题库