-What's your new house like, John?  

-It's a very nice one ________ a big garden.  

A. of

B. for

C. to

D. with

连续X线的最短波长的叙述，正确的是

A．与管电流成正比

B．与管电压成反比

C．与靶物质有关

D．与管电压成正比

E．与X线管内真空度有关