跨班科学比赛
Quiz
•
Science
•
1st - 12th Grade
•
Medium
LIM KANG林惟康
Used 4+ times
FREE Resource
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50 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
空气是一种...
纯净物
混合物
单质
有机物
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
哪一种方式可以用来辨别二氧化碳和氧气?
是否能使人类呼吸
倾倒气体,能使蜡烛熄灭
燃烧后是否会产生爆鸣声
是否能溶于水
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
当金属发生氧化后,通常质量会....?
变重
变轻
不变
消失
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
下列哪个过程会产生二氧化碳?(多选题)
光合作用
燃烧碳酸钙(石灰石)
呼吸作用
酸碱中和反应
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
木炭6g完全燃烧能生成二氧化碳22g,问6g木炭完全燃烧需和多少g的氧气结合?
6公克
18公克
16公克
28公克
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
血液的成分中,
只有_______和________具有运输功能。
血浆、白细胞
血浆、红细胞
白细胞、血小板
红细胞、白细胞
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