题目内容
（请给出正确答案）
A.class reason
B.psychological reason
C.historical reason
D.all the above
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B.went for
C.went into
D.put up with
A.personality of the teacher
B.class size
C.course requirement
We learn from the passage that the push factors are related to______.
A．low employment
B．personal choice
C．tax revenue
D．home countries
Which of the following factors are very important in developing friendships？
A．Age and background.
B．Economic and social positions.
C．Race and looks.
D．Same interests and behavior.
A. students’ cooking skills
B. the country’s language policy
C. social-cultural factors
D. society’ attitudes toward the target language
A) increase
B) elevate
C) heighten
D) escalate
______is NOT one of the factors that tend to promote social change.
A．Greater worldly interest
B．Different points of view
C．Greater tolerance
D．Advanced technology
A.The ozone hole over Antarctica
B.Low population
C.Favourable geographic features
D.A late development of industry
Which is the major regulator of proliferation and differentiation of megakaryocytes
A．erythropoietin
B．colony stimulating factors
C．granulocyte colony-stimuIating factor
D．interferon
E．thrombopoietin
The author's purpose of writing the passage is to ______.
A．offer advice on how to give up smoking
B．explain the influence of cigarette smoking on health
C．list the factors that can cause cancer
D．compare the opinions on the effect of smoking
