All spontaneous reactions are exothermic.
All spontaneous reactions are exothermic.
Chronic spontaneous urticaria is defined as spontaneous wheal or angioedema that occurs repeatedly for more than 8 weeks and occurs at least twice a week.
Chronic spontaneous urticaria is defined as spontaneous wheal or angioedema that occurs repeatedly for more than 8 weeks and occurs at least twice a week.
All exothermic reactions are spontaneous reaction .
All exothermic reactions are spontaneous reaction .
The light emitted by the LED is incoherent light, and its basic principle is . A: spontaneous radiation B: stimulated absorption C: stimulated radiation D: spontaneous absorption
The light emitted by the LED is incoherent light, and its basic principle is . A: spontaneous radiation B: stimulated absorption C: stimulated radiation D: spontaneous absorption
The light emitted by the LED is incoherent light, and its basic principle is . A: stimulated absorption B: spontaneous radiation C: stimulated radiation D: spontaneous radiation
The light emitted by the LED is incoherent light, and its basic principle is . A: stimulated absorption B: spontaneous radiation C: stimulated radiation D: spontaneous radiation
The spontaneous shoaling of tuna is a clear example of natural ______.
The spontaneous shoaling of tuna is a clear example of natural ______.
4.It can be inferred that spontaneous spending is usually ________.
4.It can be inferred that spontaneous spending is usually ________.
13. Friendship is spontaneous and to be worked at, both natural and________._
13. Friendship is spontaneous and to be worked at, both natural and________._
spontaneous means happening or done without being planned.（)
spontaneous means happening or done without being planned.（)
All spontaneous reactions are exothermic. A: 正确 B: 错误
All spontaneous reactions are exothermic. A: 正确 B: 错误