【单选题】下列联轴器中,能补偿两轴的相对位移并可缓冲、吸振的是( )。
【单选题】听力原文: Americans recognize that there is a past on which the present rests. But they have not developed their sense of the depth of time to the extent that this has been done in the Middle East and Sou...
A.
Twenty thousand years.
B.
Two to six thousand years.
【单选题】有的化学物的交互作用可引起化学物的代谢酶系发生变化,例如马拉硫磷与苯硫磷联合作用,可对大鼠增毒达10倍、狗为50倍。其机理可能是苯硫磷可抑制肝脏分解马拉硫磷的酯酶。那么,马拉硫磷与苯硫磷的联合作用表现为
【单选题】沃尔普认为,个体不可能有相互对立的情绪同时发生,比如紧张和放松,如果有相反性质的情绪反应存在,那两者一定会产生相互抑制或抵消,这就是( )原理。
【单选题】The lake by the village is believed ______ a number of victims in the past 3 years.
【单选题】java用()机制实现了进程之间的异步执行