Reporting that one of their more crippling malfunctions has been the sudden and unexpected failure of the liquid helium cooling system, the engineering squad supervising the Large Hadron Collider requested additional funding to develop better maintenance systems.
-
Atheir more crippling malfunctions has been the sudden
分析该选项
-
Btheir more crippling malfunctions has been the suddenly
分析该选项
-
Cits more crippling malfunctions is the sudden
分析该选项
-
Dits more crippling malfunctions had been the sudden
分析该选项
-
Eits more crippling malfunctions had been the suddenly
分析该选项
显示答案
正确答案: D