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【简答题】
在图所示的曲柄滑块机构中，已知各构件的尺寸为l AB =100mm，l BC =400mm，连杆2的质量，m 2 =12kg，质心C 2 在l BC2 =l BC /3处；滑块3的质量m 3 =20kg，质心在C点处；曲柄1的质心与A点重合。今欲利用平衡质量法对该机构进行平衡。试问若对机构进行完全平衡和只平衡滑块3处往复惯性力的50%，需加多大的平衡质量(取l BC' =l AC' =50mm)及平衡质量应加在什么地方?
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【简答题】财政是人类社会发展到一定历史阶段的产物,以_____的产生为前提。
【单选题】The Contract (Rights of Third Party) Act 1999 sets out circumstances where a third party has right to enforce rights they may have under the contract. Which of the following statement concerning Contr...
A.
The third party need not be expressly identified in the contract
B.
The Act confers rights to third party under a company’s constitution
C.
The third party need not be in existence
D.
The Act confers rights to third party under employment contracts
【单选题】What does RPO start with?
A.
Third party recruiters
B.
Contract recruiting
C.
Internal staffing Agency
D.
In-house recruitment
【单选题】Which of the following is true of security?______.
A.
The most common form. of third party security is the guarantee.
B.
When the security is jointly owned but only one of the owners is borrowing, the security is third party.
C.
It is important in practice to decide correctly whether a security should be first party or third party.
D.
All of the above.
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