【单选题】一对外啮合斜齿圆柱齿轮传动,当主动轮转向改变时,作用在两轮上的哪些分力的方向随之改变?( )
【单选题】30岁女性,主诉外阴瘙痒就诊,医生妇科检查发现阴道分泌物呈黄白稀薄泡沫状,初步诊断为
【多选题】控制元件用来控制或调节液压系统中油液流动方向、压力和流量,以保证液压执行元件和工作机构完成指定工作。属于控制元件的是( )。
【单选题】What do we learn about Thomas Jefferson? 查看材料
A.
His political view changed his attitude towards slavery.
B.
His status as a father made him free the child slaves.
C.
His attitude towards slavery was complex.
D.
His affair with a slave stained his prestige.
【单选题】以下选项中不属于砌体结构的优点的是
D.
采用配筋混凝土砌块,较现浇钢筋混凝土可节省模板。