Free-living, single-celled eukaryotic microorganisms are simple cells that can swim, mate, hunt, and devour other microorganisms.

Hip replacement surgery is______joint replacement surgery in the U.S. A: the single most frequent B: the most single frequent C: the single frequent D: a single frequent

What situation does inflammatio occur （ ） A: Anly living organism B: Lliving organism with a vascular system C: Dead organism D: Single-celled organism

下列数组声明语句中， 不正确的是___________。 A: Dim a(5) As Single B: Dim a(1 To 5) As Single C: Dim a(0) As Single D: Dim a(5) As Single=(1，2，3，4，5，6)

下面数组初始化语句正确的是（ ）。 A: Dim A(9) As Single={1,2,3,4,5,6,7,8,9,10} B: Dim A( ) As Single={1,2,3,4,5,6,7,8,9} C: Dim A(9) As Single={1,”A”,”BC”,2,3,4,5,6,7,8} D: Dim A(9) As Single={1,2,3,4,5,6,7,8,9,10}

下面数组初始化语句正确的是（ ）。 A: Dim A(9) As Single={1,2,3,4,5,6,7,8,9,10} B: Dim A( ) As Single={1,2,3,4,5,6,7,8,9} C: Dim A(9) As Single={1,”A”,”BC”,2,3,4,5,6,7,8} D: Dim A(9) As Single={1,2,3,4,5,6,7,8,9,10}

Clerk: Good morning. Can I help you Mr. Smith: Yes, I"d like a ticket to New York 9:15 tomorrow morning. Clerk:______ Mr. Smith: Single, please. A: Single or two B: Single or return C: Single or double D: Single or back

single choice

single ticket

______ a single word can change the meaning of a sentence, a single sentence can change the meaning of a paragraph.