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【判断题】
灰铸铁的消振性能比碳钢差A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】When a tax is placed on a good
A.
the price paid by buyers rises, and the price received by sellers rises.
B.
the price paid by buyers rises, and the price received by sellers falls.
C.
the price paid by buyers falls, and the price received by sellers rises.
D.
the price paid by buyers falls, and the price received by sellers falls.
【单选题】FreeRTOS 中任务( Task )可能处于:运行态、阻塞态、就绪态、挂起态四种之一,不同状态之间可以进行转换,但以下不可能直接实现的转换是:( )
A.
由就绪态到运行态
B.
由阻塞态到挂起态
C.
由就绪态到挂起态
D.
由挂起态到阻塞态
【单选题】当一条船经过的时候,他们本来可以得救,但为什么作为求救信号的火熄灭了 ?
A.
负责看火的杰克去打野猪了
B.
负责看火的西蒙独自进到了小林子里
C.
小家伙们内部发生了冲突，没人照料火
D.
没有对看护火把的任务进行明确分工
【单选题】When a tax is placed on the buyers of a product, the
A.
size of the market decreases.
B.
effective price received by sellers decreases, and the price paid by buyers increases.
C.
demand for the product decreases.
D.
All of the above are correct.
【简答题】把下列句子变成被动词态。 1. Do they teach Japanese in their school? ______________________________________________________ 2. We heard her sing in the room. ______________________________________________________ ...
【单选题】When a tax is placed on the buyers of a product, a result is that buyers effectively pay
A.
less than before the tax, and sellers effectively receive less than before the tax.
B.
less than before the tax, and sellers effectively receive more than before the tax.
C.
more than before the tax, and sellers effectively receive less than before the tax.
D.
more than before the tax, and sellers effectively receive more than before the tax.
【单选题】When a tax is placed on the sellers of a product it will shift the
A.
supply curve down.
B.
supply curve up.
C.
demand curve up.
D.
demand curve down.
【简答题】uC/OS-II的每个任务都处在休眠态、就绪态、___【31】____态、挂起态和被中断态5种状态之一的状态下。其中，在就绪态中霤/OS-II就绪表为每一个任务提供一个二进制位，登记该任务是否就绪，就绪时对应位的值为___【32】____。
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