【简答题】一台220/110V的单相变压器,试分析当高压侧加220V电压时,空载电流I 0 呈何波形----( ) 高压侧若加110V时,空载电流又呈何波形 ----( ) 若110V加到低压侧,此时I 0 又呈何波形 ----( ) (选填 尖顶波 正弦波 平顶波)
【单选题】某产妇,妊娠38周,规律宫缩2小时入院。
A.
后9小时,宫缩好。肛查:宫口开大8cm,胎头位于坐骨棘下2cm,诊断为( )
【单选题】美国对羽毛制品的进口税,普通税率为60%,最惠国税率为 4.7% ,这种税是 ( )
【简答题】Listen and fill in the blanks.(听并完成填空) My name is Coronavirus because I look like a 1.________ . I am very tiny. You cannot see me with your 2.__________. When I live with wild animals, I do not 3.___...
【判断题】若线性规划的对偶问题无可行解,则原问题也一定无可行解
【判断题】“固定资产”账户借方余额减去“累计折旧”账户的贷方余额后的差额,即为资产负债表中固定资产项目填列数额。
【简答题】My name is Coronavirus because I look like a crown. I am very 1.______. You cannot see me with your eyes. When I live with 2_____, I do not hurt humans. But some people do not respect nature. Then, I ...
【简答题】Helen: Brad, has the first batch of the machines __1__ by the German company been stored in the warehouse? Brad: Yes, Helen. Here is the receipt form I filled yesterday. Helen: Okay, the goods were tr...
【多选题】在下列分部分项工程中,施工单位应当组织专家对专项施工方案进行论证的有( )。