单项选择题

Education in Russia and the other new countries faces especially daunting obstacles because the struggling economies of these nations often provide insufficient funds for education.

A．stunning
B．discouraging
C．concerning
D．prevailing
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单项选择题
Not until the advent of histochemistry could the anatomist see through the microscope ceils which carry specific enzymes or gauge how active these enzymes are in different ceils under various conditions.
A．discern
B．grasp
C．measure
D．estimate
单项选择题
It was obvious that she and her husband were ______ and she wished she'd never married him.
A．insolvable
B．insensible
C．inseparable
D．incompatible
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