问题描述：
英语选择16
some colonies of bryozoans,small marine animals,form------with trailing stems.
A creeping colonies
B which colonies creep
C creeping colonies are
D colonies creep
为什么选A
some colonies of bryozoans,small marine animals,form------with trailing stems.
A creeping colonies
B which colonies creep
C creeping colonies are
D colonies creep
为什么选A
问题解答：
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