【单选题】Scientists have devised a way to determine roughly where a person has lived using a strand(缕)of hair, a technique that could help track the movements of criminal suspects or unidentified murder victim...
A.
One's hair growth has to do with the amount of water they drink.
B.
A person's hair may reveal where they have lived.
C.
Hair analysis accurately identifies criminal suspects.
D.
The chemical composition of hair varies from person to person.
【判断题】牛顿研究天体力学和机械力学的时候,利用了微分方程这个工具,从理论上得到了行星运动规律
【单选题】What does the speaker think of using a high-tech test to determine whether a person is telling the truth?
A.
It is not to be trusted at all.
B.
It does not sound economical.
C.
It may intrude into people ’ s privacy.
D.
It may lead to overuse in court trials.