（ ） means when a business advertises its product or service to triggering the curiosity of prospective clients.

Flu usually _______ in the season of spring. A: occurs B: developing C: triggering D: responsibility E: deteriorated

Questions 6 to 10 are based on the following news. 8（） A: Worsening water scarcity. B: Increasing risks of diseases. C: Triggering mass displacement. D: Reducing the population in Asia.

In conclusion, to use an analog oscilloscope, you need to adjust three basic settings to accommodate an incoming signal:· The attenuation or amplification of the signal. Use the volts/div control to adjust the amplitude of the signal before it is applied to the vertical deflection plates.· The time base. Use the sec/div control to set the amount of time per division represented horizontally across the screen.· The triggering of the oscilloscope. Use the trigger level to stabilize a repeating signal.Also, adjusting the focus and intensity controls enables you to create a sharp, visible display.

As a tornado chaser just waking up in the morning, what meteorological conditions would you seek if you were interested in viewing a tornado that afternoon? (Select all that apply) A: Triggering cold front B: Warm moist air near the Earth's surface C: Warm moist air aloft D: Receding warm front E: Conditional instability in the atmosphere F: Surface high pressure system G: Cold dry air aloft H: Surface low pressure system