【单选题】肾的表面包有三层被膜,由内向外依次为()
【单选题】It can be inferred from physical phenomenon ______.
A.
the force of the electromagnetic field is too weak to be harmful
B.
the force of the electromagnetic field is weaker than the electric field that the cells generate
C.
electromagnetic field may affect health
D.
only more powerful radiation can knock electron out of human body
【单选题】The probable safe level for constant exposure to electromagnetic radiation is 1 milligauss both for adults and children.
【简答题】肾的被膜有三层,由内向外依次为-----、------和--------。
【简答题】肾的被膜有三层,由外向内依次为( )( )( )。