In 1796 investigations into the chemical nature of diamond concluded ______a form of pure carbon.

admin2005-01-30  38

问题 In 1796 investigations into the chemical nature of diamond concluded ______a form of pure carbon.

选项 A、that it
B、is it
C、that it is
D、is that

答案C

解析
转载请注明原文地址:https://kaotiyun.com/show/6ByO777K
0

随机试题
最新回复(0)