单项选择题

She claims to be very learned in biochemistry, but in fact（） she knows about it is all sadly out of date.

A. so little
B. that much
C. what little
D. how much

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单项选择题
The degree of downward slope of a beach depends on its composition of deposits as well as on the action of waves across its surface（）

A. sentiment
B. sediment
C. semester
D. segment
单项选择题
The combination of lenses in a compound microscope makes possible greater amplification than can be achieved with a single lens（）

A. management
B. magnificence
C. magnetism
D. magnification
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