【判断题】如果某单项工程的时段累计长度超过了雨季长度,则应按全年预测,不足的可按比例分析,但总的预测时段不变
【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 ysis 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】在先导式减压阀工作时,先导阀的作川主要是 ( ) ,而主阀的作用主要作用是 溢流。
【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.