皮皮学，免费搜题
登录
搜题
【单选题】
按国标规定，牌号Q235AF的含义是（ ）为235MPa的A级沸腾碳素结构钢。
A.
屈服点
B.
抗拉强度
C.
屈服上限
D.
弹性模量
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【简答题】Klingon Widgets, Inc., purchased new cloaking machinery three years ago for $5 million. The machinery can be sold to the Romulans today for $4 million. Klingon’s current balance sheet shows net fixed ...
查看完整题目与答案
【简答题】4-1 平面弯曲的特点是什么?
查看完整题目与答案
【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.
查看完整题目与答案
【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
查看完整题目与答案
【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.
查看完整题目与答案
【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
查看完整题目与答案
【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
查看完整题目与答案
【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
查看完整题目与答案
【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。
查看完整题目与答案
【判断题】力的作用线通过矩心,力矩为零
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【简答题】Klingon Widgets, Inc., purchased new cloaking machinery three years ago for $5 million. The machinery can be sold to the Romulans today for $4 million. Klingon’s current balance sheet shows net fixed ...
查看完整题目与答案
【简答题】4-1 平面弯曲的特点是什么?
查看完整题目与答案
【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.
查看完整题目与答案
【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
查看完整题目与答案
【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.
查看完整题目与答案
【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
查看完整题目与答案
【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
查看完整题目与答案
【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
查看完整题目与答案
【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。
查看完整题目与答案
【判断题】力的作用线通过矩心,力矩为零
A.
正确
B.
错误
查看完整题目与答案