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【单选题】采购石材幕墙材料，尤其是天然石材，一个品种材料选用同一矿脉、同一批量产品的目的是（）。
A.
使色差减少到最低限度
B.
使搭配更合理
C.
防止因折光不同影响观感
D.
方便统一排版，合理搭配
【单选题】Throughout history, gold has been a precious material, eagerly sought and cherished. It was probably the first metal to be mined because it is beautiful and imperishable (which will always exist or ca...
A.
gold supplies are judged to be shrinking gradually.
B.
dentistry demands more gold now than ever before.
C.
the yield of gold has been increasing since mid-1950s.
D.
gold has been highly valued as a strategic material.
【单选题】Throughout history, gold has been a precious material, eagerly sought and cherished. It was probably the first metal to be mined because it is beautiful and imperishable (which will always exist or ca...
A.
its beauty and imperishability made it the first metal discovered.
B.
rich deposits of it were found by archaeologists in ancient Greece and Egypt.
C.
primitive people must have made fine ornaments from the precious metal.
D.
Indian treasuries in Mexico were collected by slaves from brooks and veins.
【单选题】Throughout history, gold has been a precious material, eagerly sought and cherished. It was probably the first metal to be mined because it is beautiful and imperishable (which will always exist or ca...
A.
the U.S. is the largest producer of gold in the world.
B.
ancient peoples collected gold in considerable amounts.
C.
gold was first mined in the U.S. in the mid-1700s.
D.
governments keep the production of gold under control.
【单选题】Throughout history, gold has been a precious material, eagerly sought and cherished. It was probably the first metal to be mined because it is beautiful and imperishable (which will always exist or ca...
A.
arguments and proofs.
B.
personal opinions.
C.
convincing examples.
D.
factual descriptions.
【单选题】Throughout history, gold has been a precious material, eagerly sought and cherished. It was probably the first metal to be mined because it is beautiful and imperishable (which will always exist or ca...
A.
arguments and proofs.
B.
personal opinions.
C.
convincing examples.
D.
factual descriptions.