化学反应原理在科研和生产中有广泛应用
参考答案:xS+2e-=Sx2-
解析:
He went ahead()all warnings about the danger of his mission.
A.in case of
B.in place of
C.in spite of
D.regardless of
下列哪段妊娠时间,胚胎发育易受职业有害因素影响而致畸()。
A.3~8周
B.受精后11天
C.8~12周
D.1~2周
E.无明显时间阶段