【单选题】质量为m的小球系于细绳的一端,绳的另一端敷在一根竖直放置的细棒上,如图所示。小球被约束在水平面内绕细棒旋转,某时刻角速度为ω 1 ,细绳的长度为r 1 。当旋转若干圈后,由于细绳缠绕在细棒上,绳长变为r 2 ,则这时小球绕细棒旋转的角速度ω 2 与原来ω 1 的关系为( )
【单选题】日本在《二十一条》中提出:“中国沿海岛屿不得租于他国。”其真实目的是( )。
【判断题】51单片机的两个定时/计数器T0和T1均有定时和计数两种工作模式。
【单选题】7在产品生命周期的( ),参加团体对消费者的影响主要在品牌上。
【单选题】听力原文:W: I'm sorry. I just don't agree with you at all. M: Look. Take the example of an international student applying for university admission. If the student has a 500 on the TOEFL or an 80 on the Mi...
A.
Admission standards at the University of Michigan.
B.
The use of standardized tests for college admissions.
C.
The TOEFL(Test of English as a Foreign Language).
D.
Evaluation without standardized tests.
【单选题】听力原文:S: I'm sorry. I just don't agree with you at all. P: Look. Take the example of an international student applying for university admission. If the student has a 500 on the TOEFL or an 80 on the Mi...
A.
Admission standards at the University of Michigan.
B.
The use of standardized tests for college admissions.
C.
The TOEFL (Test of English as a Foreign Language).
D.
Evaluation without standardized tests.
【单选题】“ Look, Officer. I ’ m not drunk. I ’ m as as a judge. ” The drunkard pleaded for himself.