Water is a poor conductor because it contains ______.
Giải bởi Vietjack
Đáp án B
Nước là chất dẫn điện kém bởi vì nó chứa
A.chỉ có điện tích dương
B. chỉ một lượng nhỏ các phân tử mang đầy điện
C. chỉ mang điện tích âm
D. không có điện tích âm hay điện tích dương
Dẫn chứng:Water itself is a poor conductor of electricity as it does not contain a significant amount of fully charged particles (the ends of a water molecule are partly charged but overall the molecule is neutral).
When compared with implements "flaked with a counter-clockwise rotation”, it can be inferred that "implements flaked with a clock-wise motion" are ______________.
Salt in its solid state is not able to conduct electricity because ______.
According to the passage, which of the following was an obstacle to the development of the icebox?
The author mentions “fish” in the first paragraph because __________________.
Which of the following is NOT considered an essential characteristic of architecture according to the passage?
Which of the following could best serve as the title of the passage?
The word "congested" in paragraph 1 is closest in meaning to ________________.
The word "substitutes" in paragraph 1 is closest in meaning to ________________.
For example, cheap oral-rehydration therapy developed in Bangladesh has dramatically cut the death (282)______ from childhood diarrhoea.
