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【单选题】
关于上皮组织的特点以下哪项不正确A.
大量密集的细胞和少量细胞外基质
B.
细胞有极性
C.
细胞基部有基膜
D.
细胞侧面有特殊连接
E.
上皮内有丰富的血管和神经末梢分布
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【单选题】Bacteria are microscopic organisms which live on the suce of objects. They are one of the most ancient living things, which exist on this planet for nearly 4,000 million years. Do you know the size...
A.
Bacteria are as big as a pinhead.
B.
Bacteria can not be seen by an ordinary microscope.
C.
Bacteria are hard to see because they often live together.
D.
Bacteria are very small so they can only be measured in microns.
【单选题】—I don't want _____ shopping. —What about _____ swimming? [ ]
A.
to go; going
B.
going; going
C.
go; go
D.
going; to go
【简答题】T hree-fourths of the suce of the earth (is, are) sea.
【简答题】下列关于URL的解释错误的是( )。
【单选题】______ the sun rising above the suce of the sea, we couldn ’ t help letting out a shout of joy.
A.
Seeing
B.
See
C.
To see
D.
Having been seen
【简答题】A line of diaphragm wall is driven 4m into a firm clay and retains, on one side, a 3m depth of sand on top of the clay. Water table is at the suce of the clay. The unit weight of the fill is 17kN/m...
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