HS____ Ag2Cl____ NaCO3____MgNO3____
AlSO4____MgOH____ BaO2____NH4SO4____.
在括号里填上合适的词语。
____的花朵 ____的清香 ____的孩子
根据句意及所给汉语意思写出所缺单词。(1)I want to be a ____ (志愿者) in the coming sports meetings.(2)Without my____ (允许),don't touch my things.(3)Our next door ____ (邻居) is an old lady.(4)I wish our____ (友谊) will last long.(5)The kind man helped the blind woman go____ (穿过) the street at the crossing.
噬菌体在细菌细胞内合成自己的蛋白质需要( )