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【判断题】
设机器中的实际驱动力为 P,在同样的工作阻力和不考虑摩擦时的理想驱动力为 P0,则机器效率的计算式是【图片】
A.
正确
B.
错误
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参考答案:
举一反三
【单选题】下面运算符中,哪一个优先级最高?
A.
+
B.
&&
C.
==
D.
*=
【判断题】单相变压器一、二次侧电压相位关系决定于绕组绕向。
A.
正确
B.
错误
【单选题】When Rulon won the Olympics, ______.
A.
some of his family watching
B.
none of his family could afford to go
C.
the people of Alton had no televisions to watch
D.
his family was working on the farm
【单选题】4岁男孩,身高90cm,体重11kg,皮肤较松弛,腹部皮下脂肪约O.3cm,该小儿的营养状况属
A.
正常
B.
轻度营养不良
C.
中度营养不良
D.
重度营养不良
E.
极重度营养不良
【简答题】Two traveling angels(天使) stopped to spend the night in the home of a wealthy family. The family was rude and refused to let the angels stay in the guest room. Instead the angels were given a space in ...
【单选题】His family members gave some examples of ______ his drinking and smoking had affected the family
A.
19. His family members gave some examples of ______ his drinking and smoking had affected the family. A.that
B.
what
C.
how
D.
Whether
【单选题】从心脏发出,进入体循环的大动脉名称为( )。
A.
主动脉弓
B.
肺动脉
C.
肺静脉
D.
后腔静脉
【单选题】His  family very big and all ofhis family music .
A.
. are ; 1ove    
B.
. are ; 1oves    
C.
. is ; have    
D.
. is ; 1oves
【单选题】上部结构为柔性结构且基础本身刚度较小的条形基础,其基础梁纵向内力计算方法应选择
A.
静定分析法
B.
倒梁法
C.
弹性地基梁法
D.
有限元法
【判断题】单相变压器一、二次侧电压相位关系决定于绕组绕向和首末端标记。
A.
正确
B.
错误
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