The correct statement of the transition attribute is（ ） A: transition-duration sets when the transition effect starts B: transition-duration sets how many seconds or milliseconds the transition effect takes C: transition-delay sets when the transition effect starts D: transition-delay sets how many seconds or milliseconds the transition effect takes

以下_________方法是在Thread类中定义? A: sleep(long milliseconds) B: wait() C: notify() D: toString()

可以使用________方法强迫一个线程等待另一个线程的结束. A: sleep(long milliseconds) B: yield() C: stop() D: join()

In an inversion recovery T1-weighted image, tissues with short, medium, and long T1 relaxation times will have low T1 contrast between each other when TI is:（在反转恢复T1加权图像中，当TI为：，具有不同T1弛豫时间的组织之间会具有较低的T1对比度） A: ) short, around 10 milliseconds.（短，约为10ms） B: ) long, around 3 seconds.（长，约3s） C: ) both a and b.（a，b均可）