等速运动凸轮从动杆运动平稳,不会引起机构强烈的振动。
参考答案:错
The reason _____ which he wants to reason _____ then is still unknown
A With ,in B in ,with C for , with D with ,for
可作为铅中毒诊断指标的是
A.血中锌原卟啉增高
B.尿中马尿酸增高
C.尿中酚含量增高
D.血中HbCO含量增高
E.高铁血红蛋白血症