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【单选题】
—Is this your baseball, David? —No, it's not . It's Helen's.A.
his
B.
yours
C.
mine
D.
hers
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举一反三
【单选题】The diagnosis of multiple sclerosis is often based upon which finding?
A.
The presence of elevated protein and low glucose
B.
A decreased IgG index
C.
The presence of oligoclonal bands by electrophoresis
D.
An increased level of CSF β-microglobulin
【单选题】The new finding is based on a thorough study of 170，000 stars on the Milky Way. 查看材料
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】Snedeker, Geren and Shafto based their study on children who
A.
were finding it difficult to learn English
B.
were learning English at a later age than US children
C.
had come from a number of language backgrounds
D.
had taken English lessons in China
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