将空气中氮气转化为氮的化合物过程中称为固氮。下面能实现人工固氮的是
A.闪电
B.电解饱和食盐水
C.大豆的根瘤
D.合成氨工厂
答案:D
In 2002, the Chinese government ______ a law stating whoever deserts girl babies would be punished by law.
A.distributed
B.favored
C.declared
D.resigned
体重1500g早产儿,出生4周,温箱设定温度是
A.34℃
B.33℃
C.35℃
D.32℃
E.36℃