Which of the following signals can be used to attract anemion by day?
举一反三
- 中国大学MOOC: Which of the following transition signals is not used for describing causes?
- Lightning bugs can blink themselves because of a chemical substance According to the passage, which of the following about lightning bugs is INCORRECT A: They use blinking signals to communicate. B: They use blinking signals to seek for food. C: They use blinking signals to attract their own species. D: They use blinking signals to frighten and warn enemies.
- Which of the following can be used as evidence?
- Which of the following functions can a timer in a computer system be used to achieve? A: Generate interrupt signal regularly B: Measuring the frequency of external periodic signals C: Generate periodic pulse signals D: Generate periodic sine wave
- Which of the following can be used to describe the instructor?