【单选题】______ several hypotheses have been advanced for the disappearance of the dinosaur, no conclusive evidence supports any of them.
【单选题】The best title for the passage would be ______.
A.
Hypotheses and Theories
B.
On Distinguishing Fact from Fiction
C.
The Nature of Science and Scientists
D.
Biology and the Scientific Age
【简答题】(P29) 不健康的生活方式是引起多种 ( ) 的最主要原因。
【简答题】The monitor theory consists of five hypotheses, what are they?
【多选题】The hypotheses of Macroeconomics are:
A.
Market mechanisms are perfect
B.
Market mechanisms are imperfect
C.
The government has the ability and authority to regulate the economy
D.
The government do not regulate the economy, let it free
【多选题】规章制度是学生在学习、生活、工作中必须遵守的行为准则,它的作用有( )。