英文高手入來,中7英文

Reading Comprehension
q1: What is the composition of soap?
a1: the main ingredients are sodium stearate, the formula is. If you add spices and dyes which, it may lead to both color and fragrance of the soap was there; if entered, and add some drugs (such as boric acid, or carbolic acid), it becomes a medicated soap.
q2: What thermostat is applied scientific principles to work?
a2: through detection devices, to note that the temperature control device according to the number of temperature to determine whether heat.
Detection device, it could be thermistor (thermal resistor), when the temperature changes, thermistor resistance also changed. Use this feature
Be noted that temperature. Control components, it could be micro-controller (MCU)
q3: "cooling off" of the scientific principles?
a3: cooking "cooling off" is the use of the principle of expansion and contraction. Boiling water for cooking, heating and expansion due to surface and become soft, immediate access to cold water, the surface itself will be due to cold and immediately reduced, thermal expansion and contraction, the noodles will thus become more resilient, more flexible and eat up refreshing taste will be better. .
q4: scientific principles related to audio?
a4: When we produce speech against mouthpiece acoustic, sound waves will pass through the cotton rope to the other side of the mouthpiece for re-release
q5: Why we can drink out of straw to breathe it?? try to explain the principle of air pressure
a5: suck in your mouth when drinking tube in the air being sucked away to form low pressure space.
As the drinks come into contact with air, so it is in the state of atmospheric pressure.
But because the lower pressure straws, atmospheric pressure will promote the drinks took to lower air pressure inside the drinking tube, which is to use straws to drink the principle of things.