23-24年理科知識競賽_初中組 搶答題(決賽)
Quiz
•
Science
•
6th - 8th Grade
•
Practice Problem
•
Medium
philip2005 pang
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25 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
小智肚子餓,吃八寶粥以增加體力,發現其中有四種材料他認得:花生、綠豆、蓮子、白米。請問其中哪一項與另外三項的親緣關係較遠?
花生
綠豆
蓮子
白米
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
下列有關實驗操作的敘述中正確的是
應使用酒精燈火焰的焰心進行加熱
過濾時,應用玻璃棒進行引流
使用100ml量筒量取2mL水
向試管中滴加液體時,膠頭滴管應伸入試管中
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
關於家庭電路安全用電的說法正確的是:
更換燈泡前不用斷開電源開關
家庭電路中,空氣開關跳閘一定是因為電路發了短路
電冰箱的金屬外殼應該與大地相連
使用試電筆時,手指不能接觸筆尾金屬體
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
血液透析治療可以說是腎衰竭患者的福音。原理就是將患者的血液和透析液同時引進透析器(兩者的流動方向相反),利用透析器(人工腎)的半透膜,將血中蓄積的過多毒素和過多的水分清除體外。透析器(人工腎)的半透膜,相當於腎臟的什麼結構?
腎小球毛細血管壁和腎小囊內壁
腎小管壁和包繞在它外面的毛細血管壁
腎小球毛細血管壁和腎小管壁
腎小管壁和腎小囊外壁
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
近年來,我國在科技領域取得了許多成就,下列說法正確的是:
“ 天和號 ”核心艙升入太空後與地面通過電磁波聯繫
“ 嫦娥五號 ” 採集的月球樣品帶回地球後質量會變大
“國和一號”核能發電技術是利用核聚變而獲得巨大的能量
時速600公里“磁懸浮列車”是利用同名磁極相吸的原理工作
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
下列物質的用途主要由其物理性質決定的是
氮氣用於食品保鮮
白醋用於去除水垢
氧氣用於煉鋼
乾冰用於人工降雨
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
由外傷造成動脈損傷比靜脈損傷更危險,其原因是:
動脈內血壓高、血流速度快
動脈內血液含營養物質多
動脈內血液含氧比較多
動脈管壁厚不易癒合
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