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【多选题】
 下列行为符合社会公德要求的有( )
A.
不随地吐痰
B.
不随地乱扔果皮纸屑
C.
捡到财物占为己有
D.
爱护公园或路边的花草树木
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【简答题】4-1 平面弯曲的特点是什么?
【单选题】In January the price of widgets was $1.00, and Wendy's Widgets produced 80 widgets. In February the price of widgets was $1.50, and Wendy's Widgets produced 110 widgets. In March the price of widgets ...
A.
0.79 when the price increased from $1.00 to $1.50 and 0.84 when the price increased from $1.50 to $2.00.
B.
1.27 when the price increased from $1.00 to $1.50 and 1.19 when the price increased from $1.50 to $2.00.
C.
0.79 when the price increased from $1.00 to $1.50 and 1.19 when the price increased from $1.50 to $2.00.
D.
1.27 when the price increased from $1.00 to $1.50 and 0.84 when the price increased from $1.50 to $2.00.
【判断题】力的作用线通过矩心时,力对点的矩为零。 ( )
A.
正确
B.
错误
【单选题】Suppose that the equilibrium price in the market for widgets is $5. If a law increased the minimum legal price for widgets to $6, producer surplus
A.
would necessarily increase even if the higher price resulted in a surplus of widgets.
B.
would necessarily decrease because the higher price would create a surplus of widgets.
C.
might increase or decrease.
D.
would be unaffected.
【简答题】平面弯曲的受力特点: ;变形特点 。
【多选题】当进行强烈体力活动时,主要通过用()使心输出量增加。
A.
心率储备
B.
舒张储备
C.
收缩储备
D.
心力储备
【判断题】平面弯曲的特点是:梁上的载荷及支座反力位于纵向对称平面并垂直于梁的轴线,梁的轴线在此平面内弯成一条曲线
A.
正确
B.
错误
【简答题】要发送的数据为 1101011011 。采用 CRC 的生成多项式是 P(X)=X 4 +X+1 。 (1) 试求应添加在数据后面的余数。 (2) 若数据在传输过程中最后一个 1 变成了 0 ,问接收端能否发现? (3) 若数据在传输过程中最后两个 1 都变成了 0 ,问接收端能否发现?
【多选题】下列选项中哪些是平面弯曲的特点
A.
具有纵向对称面的梁
B.
梁的外力均垂直于梁的轴线,并作用在纵向对称面内
C.
梁的轴线弯成纵向对称面内的一条平面曲线
D.
梁的外力必须是集中力
【简答题】平面弯曲 变形特点:杆件的轴线由直线变成 ,发生平面弯曲。
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