搜题请搜索小程序“爱下问搜题”
问题
填空题
内燃机车制动过流继电器是用于监视（）。
答案
参考答案：制动电阻电流
选择题
When I asked her what she did yesterday, she pretended ___ about it.
A. not to hear
B. not having heard
C. to not have heard
D. not to have heard
查看答案
单项选择题
参与构成足底弓的动脉是（）。
A.足底内侧动脉
B.足底外侧动脉
C.弓状动脉
D.跗内侧动脉
E.跗外侧动脉
查看答案
