Free
登录
Question
Test
Premium
News
Answer
Course
Wish Board
题库
Science
题目列表
Which of the following defines a pure substance th...
Single Choice
Which of the following defines a pure substance that cannot be broken down by any chemical means?
A.
Compound
B.
Element
C.
Solid
D.
Solution
上一题
[问答题] How many lone pairs of electrons exist in a single water molecule?
下一题
[单选题] Nick, Anna, and Sherry go on a vacation and agree to split the costs evenly. During the trip, Nick p...
纠错
题目信息
Normal
MiddleSchool
-
正确率
0
评论
0
点击
Favorite
Favorite
Mistake Journey
Mistake Journey
My Notes
Logon to Add Notes