4.
Your Answer is
Correct Answer is J
Explanation
such as sand is a whole with no sign in the middle, so F/H is excluded. The heating substances are whole, unsigned in the middle, so G is excluded.
4.
Your Answer is
Correct Answer is J
Explanation
such as sand is a whole with no sign in the middle, so F/H is excluded. The heating substances are whole, unsigned in the middle, so G is excluded.