【单选题】We must derive hydrogen from renewable sources with a view to a pure hydrogen economy.
【判断题】Obtaining hydrogen from electrolysis is being studied as a viable way to produce it domestically at a high cost.
【单选题】______, he can now only watch it on TV at home. (1998年考试真题)
A.
Obtaining not a ticket for the match
B.
Not obtaining a ticket for the match
C.
Not having obtained a ticket for the match
D.
Not obtained a ticket for the match
【单选题】社会主义初级阶段的长期性,从根本上说是中国进入社会主义的历史条件和建成社会主义所需要的( )所决定的.
【单选题】Hydrogen is the fundamental element of the universe______it provides the building blocks from which the other elements are produced.
【判断题】社会主义初级阶段具有长期性是由中国进入社会主义的历史条件和建成社会主义所需要的物质基础所决定的.
【简答题】We must derive hydrogen from __________________ with a view to a pure hydrogen, economy.