()不是育婴师学习预防铅中毒的的工作内容。
A、治疗方案及原则
B、治理铅污染
C、预防措施
D、观察婴儿铅中毒的症状
参考答案:B
It was announced that only when the terrible disease was under control _____ to return to
their homes.
A.the residents would decide
B.would the residents decide
C.would the residents be decided
D.the residents would be decided
汽油辛烷值越高,抗爆性越好。