2011年职称英语考试理工类C级模拟(5)

2011年职称英语考试理工类C级模拟(5)

16 Nowadays many scientists depend on radiocarbon for dating age-old objects
A Right
B Wrong
C Not mentioned #

17 The radiocarbon dating technique is only about 40 years old

#

A Right
B Wrong
C Not mentioned
18 An atom of ordinary carbon has six protons and eight neutrons

#

A Right
B Wrong
C Not mentioned #

19 Radar is used to determine the characteristics of radiocarbon

A Right
B Wrong
C Not mentioned #

20 Radiocarbon is reliable in dating an object back to at least 50,000 years #

A Right
B Wrong
C Not mentioned #