救救孩子，Verbal求助
381213
In California's Mojave Desert, archaeologists found two fluted projectile points, one on the surface, one buried, both similar to classic Clovis stone points from the American Plains. They obtained a radiocarbon date of 8,470 years from material associated with the buried point, a date far more recent than the known time range for Clovis points. There are three ways accounting for this date. First, it is possible that fluted points were in use in this region around 8,470 year ago. Second, this point may somehow have been deposited at the California site long after its creation. Third, the 8,470 year date may be wrong: a second date from the same context providing an age of 4,360 years was rejected by archaeologists as incorrect.
Consider each of the choices separately and choose all that apply.
1. If the first explanation is the only one of the three that is correct, then it can be inferred that
A. the material associated with the buried point and the point itself are not from the same time period
B. there may be other fluted points in the region that date from about 8,470 years ago
C. the accepted time range for classic Clovis points may need to be reconsidered
2. It can be inferred that the second and the third explanations have which of the following in common?
A. Each implies that the known time range for classic Clovis points will need to be revised.
B. Each leaves open the possibility that the California fluted points were created contemporaneously with classic Clovis points.
C. Each suggests that the radiocarbon dating used at the California site produced unreliable results.
D. Each implies that 8,470 years ago, fluted points were more widely used on the American Plains than in the region of the California site.
E. Each is based on the assumption that the buried fluted point did not originate at the Californiasite.
答案：1.BC 2.B
我对三个解释的理解：
1. 这俩fluted points被使用的时间点就是8470年左右，这个时间是对的，至于为什么和Clovis时间上不一致、有啥关系，那尚不知道；
2. 这俩fluted points很早就出现，后deposit到这个地方来，测算的8470这个时间也是material的时间，与fluted points无关；
3. 这point还测出过4360年，所以8470年这个时间测算很大程度上也有问题，因此存在这个buried point和Clovis时间一致的可能。
就，我哪里理解错了呢，这俩题让我满脸问号。谢谢各位大佬
Consider each of the choices separately and choose all that apply.
1. If the first explanation is the only one of the three that is correct, then it can be inferred that
A. the material associated with the buried point and the point itself are not from the same time period
B. there may be other fluted points in the region that date from about 8,470 years ago
C. the accepted time range for classic Clovis points may need to be reconsidered
2. It can be inferred that the second and the third explanations have which of the following in common?
A. Each implies that the known time range for classic Clovis points will need to be revised.
B. Each leaves open the possibility that the California fluted points were created contemporaneously with classic Clovis points.
C. Each suggests that the radiocarbon dating used at the California site produced unreliable results.
D. Each implies that 8,470 years ago, fluted points were more widely used on the American Plains than in the region of the California site.
E. Each is based on the assumption that the buried fluted point did not originate at the Californiasite.
答案：1.BC 2.B
我对三个解释的理解：
1. 这俩fluted points被使用的时间点就是8470年左右，这个时间是对的，至于为什么和Clovis时间上不一致、有啥关系，那尚不知道；
2. 这俩fluted points很早就出现，后deposit到这个地方来，测算的8470这个时间也是material的时间，与fluted points无关；
3. 这point还测出过4360年，所以8470年这个时间测算很大程度上也有问题，因此存在这个buried point和Clovis时间一致的可能。
就，我哪里理解错了呢，这俩题让我满脸问号。谢谢各位大佬
