Question
8 to 19 are based on this passage
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Question 8
According to the passage, it can most likely be inferred that iridium
A. can be used by scientists to determine the duration of an event
B. causes mass extinctions in a short period
C. gathers excessively in clay deposits
D. helps scientists determine the orientation of the magnetic field
E. leads to inaccurate conclusions regarding the chronology of an event
我的答案： 无