What building material made high buildings possible in Chicago?
举一反三
- During the construction of high buildings, cranes (起重机) are used to ________ building materials to the upper floors.
- Television and radio ______ to know what is going on all overThe world. A: made it possible of us B: have made us possible C: have made it possible for us D: have made it be possible for
- The oxygen equipment made it possible for climbers to rest very high altitudes.
- The laws that （ ）how the buildings maybe made are building codes. A: tell B: tells C: told D: telling
- What made a large scale of industrial production possible?