【单选题】课程考核平时成绩和期末成绩的占比分别为百分之多少?
【单选题】G71指令格式中第一行的U指的是( )。
【单选题】有一 220V1000W 的电炉,今欲接在 380V 的电源上使用,可串联的变阻器是( )
【单选题】G71外圆粗车循环指令格式中,第一行 G71 中的参数 U 指定的是( ),半径值,不带正负号。
【单选题】What is the author's attitude toward science?
A.
He is confident though he is aware of the enormous difficulties in scientific research.
B.
He is doubtful because of the enormous difficulties in scientific research.
C.
He is depressed because of the ignorance of scientists.
D.
He is delighted because of the illuminating scientific findings.