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【单选题】
固定端约束通常有几个个约束反力( )A.
1
B.
2
C.
3
D.
4
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反馈参考答案：
举一反三
【判断题】We put the index finger and mid-finger apart with palm against the receiver to mean “OK”, which was first used by Winston Churchill.
A.
正确
B.
错误
【判断题】We put the index finger and mid-finger apart with palm the receiver to mean "OK", which was first used by Winston Churchill.
A.
正确
B.
错误
【判断题】We put index finger and mid-finger apart with palm against the receiver to mean “OK”, which was first used by Winston Churchill.
A.
正确
B.
错误
【判断题】We put the index finger and mid-finger apart with palm against the receiver to mean “OK,” which was first used by Winston Churchill.
A.
正确
B.
错误
【简答题】育成鸡采取限量法饲养时,限制饲喂量为正常采食量的( ),适用于蛋用型育成鸡。
【单选题】4层建筑，单层层高为4．2m，建筑有中庭64m×18m×16m，则机械排烟风机的排烟量为________。
A.
69120
B.
73728
C.
102000
D.
112200
【判断题】We put the index finger and mid-finger apart with palm against the recerver to mean "OK," which was first used by Winston Churchill.
A.
正确
B.
错误
【简答题】(B4.2A) 16 转换为二进制数是 ( ) 2
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