根据第三段最后一句“The fluoride mixes with enamel (釉质),the hard surface on teeth,to help prevent holes from forming.〞可知答案是C。答案: C相关推荐 1According to the passage,what is the function of fluoride? A. Makingthe surfaceon teeth much cleaner. B. Protecting gums from being ...
• Vitamin C is an antioxidant vitamin needed for the formation of collagen to hold the cells together and for healthy teeth,gums and blood vessels; improves iron absorption and resistance to infection.Vc是一种促进(骨)胶原合成的抗氧化维他命,有益牙齿、牙床及血管;促进铁的吸收并抵抗感染.Vitamin...
Insect mandibles are a pair of appendages near the insect’s mouth, and the most anterior of the three pairs of oral appendages. Their function is typically to grasp, crush, or cut the insect’s food, or to defend against predators or rivals. What are mandibles used for? The mandible (...
What is bone remodeling and why does it occur? What is meant by ossification? What is the chief function of the teeth? How many deciduous teeth do children have? What is a haematoma? What is the medullary cone? What attaches the tongue to the floor of the mouth?
1. Different function Chewing gum in the mouth can chew, blow bubbles, with the function of cleaning the mouth fresh breath; and bubble gum is more inclined to its sweetness and can blow bubbles to play. Chewing gum is a natural gum or glycerin resin as the basis of the gum, adding sy...
The small intestine and large intestine are long, hollow convoluted structures that form the middle and lower end of the gastrointestinal tract. Both these organs function in the absorption activities involved in the digestive process. Answer and Expla...
It is used to check for problems with your heart. An echocardiogram is an ultrasound used to find infection in your heart. Sound waves are used to show the structure and function of your heart. You may need a transthoracic or transesophageal echocardiogram. Ask your healthcare provider about ...
Vitamin C or ascorbic acid is a water-soluble vitamin required for growth and repair of tissues, wound healing and maintenance of gums, bones and teeth. It is also a powerful antioxidant which helps to prevent cell damage caused by unstable oxygen molecules known as free radicals. Oxidative dam...
What is the function of a cassette? a compact case containing a length of magnetic tape that runs between two small reels: used forrecording or playback of audio or video ina tape recorder, cassette deck, video camera, or VCR, and for storage of data by some small computer systems. See...
amaking them rigid and unable to function—it “gums up the works.” 使他们刚性和无法对作用它“分泌树液工作”。 [translate] a我就快拥有属于我自己梦想的完整境地去让我居住在那里 I on quickly have the complete region which belongs to me to vainly hope for to let me live in there [...