牙石 dental calculus
牙石 dental calculus
相关考题：
The sound of "ch" in "teacher" is（ ）.A.voiceless, post-alveolar, and affricativeB.voiceless, dental, and fricativeC.voiced, dental, and fricativeD.voiced, post-alveolar, and plosive
Which of the following correctly describes the English phoneme/d/?_________A．A voiced dental fricative.B．A voiced alveolar fricative.C．A voiceless dental plosive.D．A voiceless alveolar fricative.
The sound of "th" in "thin" is__________.A.voiceless, dental, and fricativeB.voiced, dental, and fricativeC.voiceless, dental, and affricativeD.voiced, dental, and affricative
Which of the following correctly describes the English phoneme/θ/A.A voiceless dental fricative.B.A voiceless alveolar fricative.C.A voiceless dental plosive.D.A voiceless alveolar plosive.
单选题A study by a group of dentists has concluded that regular use of a certain brand of mouthwash is as effective as flossing in preventing gum disease. The mouthwash company has released a television ad suggesting that people who do not like flossing can now rely solely on mouthwash and brushing to maintain good dental health. A leading manufacturer of dental floss brought a lawsuit against the mouthwash company demanding that the advertisement be discontinued on the grounds that it is misleading. Which of the following, if true, provides the strongest support for the dental floss company’s claim that the advertisement is misleading?AThe dental floss manufacturer is concerned that it will lose market share in the dental health market because the advertisement encourages people to switch from dental floss to mouthwash.BThe dental floss company claims in its own advertisements that brushing and flossing after every meal is the most effective way to maintain good dental health.CAlthough mouthwash is an effective deterrent to gum disease, it is less effective than dental floss at removing plaque and preventing cavities between teeth.DPer usage, mouthwash is three times more expensive than dental floss, if the recommended amounts of both products are used.EThe dentists who conducted the study on the effectiveness of mouthwash in preventing gum disease obtained their funding for the study from a company that manufactures mouthwash.
单选题Which of the following correctly describes the English phoneme/θ/?AA voiceless dental fricativeBA voiceless alveolar fricativeCA voiceless dental plosiveDA voiceless alveolar plosive
单选题The sound ofchin teacheris_________.Avoiceless, post-alveolar, and affricativeBvoiceless, dental, and fricativeCvoiced, dental, and fricativeDvoiced, post-alveolar, and plosive
判断题牛黄的拉丁名是Calculus Bovis。A对B错