The story was written in______ easy English_____ even the seven-year-old child could understand it.
A:very, that
B:so, that
C:too, to
D:such, that
用久了的日光灯管两端会变黑,这是因为钨丝受热升华的钨蒸气遇冷又发生了( )
格里菲思推论:加热杀死的S型细菌中,必然含有____能将无毒性的R型活细菌转化为有毒性的S型活细菌.
如果2*4=2×3×4×5;5*3=5×6×7,请按此规定计算