题目内容

It is most important that the children be ________ in the knowledge that they are loved.
A secure
B conscious
C reliable
D alert

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I lay in my crib at the close of that eventful day and ________ the joys it had brought me.
A came over
B took over
C recalled over
D lived over

filtration and filtering medium

reverse osmosis

阿糖胞苷水溶液pH 6．9，在60℃、70℃、80℃三个恒温水浴中进行加速试验，求得一级反应速度常数分别为3．5×10-4(h-1)、7．97×10-4(h-1)、1.84×10-3(h-1)，求反应活化能及阿糖胞苷水溶液的有效期。