【单选题】起动机带动发动机运转时,电磁开关内通电工作的线圈是( )
【判断题】在不增加土石方量时,应尽量选用加大竖曲线半径,尤其是凹形竖曲线,应避免选用最小半径。
【单选题】听力原文:M: It seems that Mary is talking with her boyfriend. W: No, she isn't. She is listening to music. What is Mary doing?
A.
She is talking with her boyfriend.
C.
She is listening to music.
【判断题】测定工业醋酸含量时,常使用的指示剂为酚酞,对于其用量没有要求。
【单选题】Mary seems to ______ a good memory for she can learn such a long passage by heart.