Do you have _____ I can eat ?[ ]
A. something
B. any thing
C. nothing
D. some thing
答案:A
拉杆式千斤顶又称双作用或三作用千斤顶,是一种专用千斤顶。适用于张拉以KT—z型锚具为张拉锚具的钢筋束或钢绞线束和张拉以钢质锥形锚具为张拉锚具的钢绞线束。( )
正常人体循环阻力的范围是
A.2000~2500dynes·sec/cm5
B.1500~2000dynes·sec/cm5
C.500~1000dynes·sec/cm5
D.2500~3000dynes·sec/cm5
E.1000~1500dynes·sec/cm5