I
• The gases which contain such molecules ...
• The van contains both heating and air conditioning equipment.
• The zone can hold two electrons per atom.
• The free 40 S particles bear ( or contain ) a protein absent from the 60 S units ( biol ).
• The cells that hold the pigment ...
• Ice sheets and mountain glaciers hold 2% of the world's water.
• The molecule incorporates four sulphur atoms.
II
• The table lists some values of ...