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【简答题】
如图 4-33 所示铰链四杆机构中,已知各构件的长度为 L AB =25mm,L BC =55mm,L CD =40mm,L AD =50mm 。求: 1 该机构是否有曲柄?如果有,指明哪个构件是曲柄。 2 该机构是否有摇杆?如果有,用作图法求出的摆角范围。 3 以 AB 杆为件时,该机构有无急回特性?用作图法求出其极位夹角 θ 。
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参考答案：
举一反三
【单选题】最常见的恶性原发性骨肿瘤是
A.
软骨肉瘤
B.
骨肉瘤
C.
尤因肉瘤
D.
纤维肉瘤
E.
骨髓瘤
查看完整题目与答案
【简答题】Reduce the informality of this sentence, and re-write the new sentence in the box.Q2:OK, what are the reasons that coffee prices have fallen? There're a lot of possibilities.
查看完整题目与答案
【多选题】针对下面句子关于style的改写，哪个是正确的？OK, what are the reasons that coffee prices have fallen? There're a lot of possibilities.
A.
A number of reasons may explain as to why the price of coffee has decreased.
B.
Several reasons are responsible for the falling price of coffee.
C.
A number of reasons may explain the decrease in the price of coffee.
D.
What are the reasons that coffee prices have fallen? There're considerable possibilities.
E.
All right, it is necessary to consider what causes the reduction of coffee price. There are plenty of possibilities.
F.
A lot of possible reasons can explain the falling of coffee prices. It remains unclear why coffee prices have fallen.
查看完整题目与答案
【单选题】二战后西方存在主义文学的主要代表是 ( )
A.
萨特
B.
加西亚·马尔克斯
C.
约瑟夫·海勒
D.
贝克特
查看完整题目与答案
【单选题】最常见的恶性原发性骨肿瘤是
A.
骨软骨瘤
B.
骨髓瘤
C.
骨肉瘤
D.
纤维肉瘤
E.
骨巨细胞瘤
查看完整题目与答案
【单选题】Refer to the figure. What are the values of the CPI in 2009, 2010, and 2011, respectively? The table shows the prices and the quantities consumed in Carnivore Country. The base year is 2009. This mea...
A.
83.5, 94.2, 100
B.
100, 113.3, 125
C.
100, 111, 139.6
D.
100, 109.2, 116
查看完整题目与答案
【单选题】What are the correct options for describing the oxygen and heat prices of food?
A.
Food oxygen calorific value is divided into biological calorific value and physical calorific value.
B.
The oxygen heat value of protein changes with the change of oxygen consumption .
C.
It refers to the heat produced by consuming 1 liter of oxygen when food is oxidized .
D.
It refers to the energy released when one gram of food is oxidized .
查看完整题目与答案
【单选题】下列面向女性消费者的市场营销心理策略不正确的是( )
A.
企业在女性产品开发策略中，最主要的是要突出美感
B.
企业在促销时利用打折活动肯定能促使女性产生消费行为
C.
多数女性容易受到促销人员的诱导而产生非理性消费
D.
针对女性的金银珠宝首饰等采用高价策略
查看完整题目与答案
【多选题】评价一个语音编码算法性能的基本指标有 。
A.
编码速率
B.
编码语音质量评价
C.
编解码延时
D.
算法复杂度
查看完整题目与答案
【简答题】Q. What are the prices for grade-one thinking?(Captitalize the letters when it is necessary.) A. God gave us two _______. One to ________ and one to ________. _________ depends on which one you use; h...
查看完整题目与答案
相关题目：
【单选题】最常见的恶性原发性骨肿瘤是
A.
软骨肉瘤
B.
骨肉瘤
C.
尤因肉瘤
D.
纤维肉瘤
E.
骨髓瘤
查看完整题目与答案
【简答题】Reduce the informality of this sentence, and re-write the new sentence in the box.Q2:OK, what are the reasons that coffee prices have fallen? There're a lot of possibilities.
查看完整题目与答案
【多选题】针对下面句子关于style的改写，哪个是正确的？OK, what are the reasons that coffee prices have fallen? There're a lot of possibilities.
A.
A number of reasons may explain as to why the price of coffee has decreased.
B.
Several reasons are responsible for the falling price of coffee.
C.
A number of reasons may explain the decrease in the price of coffee.
D.
What are the reasons that coffee prices have fallen? There're considerable possibilities.
E.
All right, it is necessary to consider what causes the reduction of coffee price. There are plenty of possibilities.
F.
A lot of possible reasons can explain the falling of coffee prices. It remains unclear why coffee prices have fallen.
查看完整题目与答案
【单选题】二战后西方存在主义文学的主要代表是 ( )
A.
萨特
B.
加西亚·马尔克斯
C.
约瑟夫·海勒
D.
贝克特
查看完整题目与答案
【单选题】最常见的恶性原发性骨肿瘤是
A.
骨软骨瘤
B.
骨髓瘤
C.
骨肉瘤
D.
纤维肉瘤
E.
骨巨细胞瘤
查看完整题目与答案
【单选题】Refer to the figure. What are the values of the CPI in 2009, 2010, and 2011, respectively? The table shows the prices and the quantities consumed in Carnivore Country. The base year is 2009. This mea...
A.
83.5, 94.2, 100
B.
100, 113.3, 125
C.
100, 111, 139.6
D.
100, 109.2, 116
查看完整题目与答案
【单选题】What are the correct options for describing the oxygen and heat prices of food?
A.
Food oxygen calorific value is divided into biological calorific value and physical calorific value.
B.
The oxygen heat value of protein changes with the change of oxygen consumption .
C.
It refers to the heat produced by consuming 1 liter of oxygen when food is oxidized .
D.
It refers to the energy released when one gram of food is oxidized .
查看完整题目与答案
【单选题】下列面向女性消费者的市场营销心理策略不正确的是( )
A.
企业在女性产品开发策略中，最主要的是要突出美感
B.
企业在促销时利用打折活动肯定能促使女性产生消费行为
C.
多数女性容易受到促销人员的诱导而产生非理性消费
D.
针对女性的金银珠宝首饰等采用高价策略
查看完整题目与答案
【多选题】评价一个语音编码算法性能的基本指标有 。
A.
编码速率
B.
编码语音质量评价
C.
编解码延时
D.
算法复杂度
查看完整题目与答案
【简答题】Q. What are the prices for grade-one thinking?(Captitalize the letters when it is necessary.) A. God gave us two _______. One to ________ and one to ________. _________ depends on which one you use; h...
查看完整题目与答案
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