【单选题】【消耗次数：1】
能引起四环素牙的药物有
①
先锋霉素和四环素
②
土霉素和去甲金霉素
③
青霉素和缩水四环素
④
链霉素和氯霉素
⑤
洁霉素和庆大霉素
参考答案：
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相关题目
【单选题】
四环素用于（ ）
【单选题】
使用四环素治疗无效的是（ ）
【单选题】
对四环素的抗菌作用机制是
①
影响胞浆膜的通透性
②
与核糖体30s亚基结合，抑制蛋白质的合成
③
与核糖体50s亚基结合，抑制移位酶的活性
④
与核糖体50s亚基结合，抑制肽酰基转移酶的活性
⑤
特异性抑制依赖于DNA的RNA多聚酶活性
随机题目
【单选题】
What meaning is referred to if we say the meaning of “dog” is friendship and loyalty?
①
denotative meaning
②
connotative meaning
③
literal meaning
④
labeled meaning.
【单选题】
What does it mean to know a word?
①
know its pronunciation and stress
②
know its spelling and grammatical properties
③
know its meaning and know when and how to use it
④
all of the above.
【单选题】
Which of the following statement is not true about vocabulary?
①
a vocabulary item can be more than one word
②
Vocabulary can not be taught. It must be learned by the individuals
③
Words are best learned in context
④
An English-English dictionary is an important aid for students.
【单选题】
What meaning is referred to if we say the meaning of “dog” is an animal with four legs and a tail, often kept as a pet or trained for work?
①
denotative meaning
②
connotative meaning
③
extended meaning
④
inspired meaning.
【单选题】
What do the following examples indicate? Big, huge; enormous, immense; male, masculine .
①
synonyms
②
antonyms
③
hyponyms
④
collocations.
【单选题】
What is referred to if we say “see a movie, watch a play, look at a picture”?
①
denotative meaning
②
connotative meaning
③
collocations
④
synonyms.
【单选题】
What are two categories of vocabulary?
①
Receptive vocabulary and productive vocabulary
②
innate vocabulary and learned vocabulary
③
familiar vocabulary and unfamiliar vocabulary
④
new vocabulary and old vocabulary.
【单选题】
What are two grammar practice activities?
①
Mechanical practice and meaningful practice
②
Volume practice and communicative practice
③
Interest practice and meaningful practice
④
Mechanical practice and success oriented practice.
【单选题】
What are two broad categories of knowledge?
①
Implicit knowledge and explicit knowledge
②
Obvious knowledge and unobvious knowledge
③
Inductive knowledge and deductive knowledge
④
Refereed knowledge and inferred knowledge.
【单选题】
Which of the following steps are typical for the deductive grammar teaching method?
①
Give examples→explain rules→students do practice activities
②
Authentic language data is provided→induces learners to realize grammar rules→apply the new structure to produce sentences (the inductive method)
③
Explicit rules are give to students→Authentic language data is provided→apply the new structure to produce sentences (the guided discovery method)
④
All of the above.