【单选题】听力原文:M: I don't know what to do with my professor.This morning we found him sleeping in his office. W: Don't be so hard on him.He's probably just weary. Q: What does the woman imply? (17)
A.
The professor is tired.
B.
The professor is lazy.
C.
The professor is sick.
D.
The professor is awesome.
【简答题】代数式 ,当 时,它的值是7;当 时,它的值是4,试求 时代数式 的值。
【单选题】铰链四杆机构中,各构件之间通过( )相连接。
【判断题】如果试算平衡结果为借贷平衡,可以肯定记账没有错误。
【单选题】铰链四机构各构件之间通中,杆过( )相连接。
【单选题】儿童受结核菌感染至PPD试验阳性的时间为( )
【判断题】如果试算平衡结果为借贷平衡,可以肯定记账没有错误。