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【单选题】Part ADirections: Read the following four texts．Answer the questions below each text by choosing A, B, C or D．(40 points)The long year of food shortage in this country have suddenly given way to appar...
A.
The abundant food supply is not expected to last
B.
Britain is importing less food
C.
Despite the abundance, food prices keep rising
D.
Britain will cut back on its production of food
【单选题】The long year of food shortage in this country have suddenly given way to apparent abundance. Stores and shops are choked with food. Rationing (定量供应 ) is virtually suspended, and overseas suppliers ha...
A.
the fall in world food prices would benefit British food producers
B.
an expansion of food production was at hand
C.
British food producers would receive more government financial support
D.
it looks depressing despite government guarantees
【单选题】设个体域A={a,b} ,公式 ∧ 在 A 上消去量词为 ( )
A.
P(a)∧P(b)∧(S(a)∨S(b))
B.
P(a)∧S(b)
C.
P(a)∧S(a)∧P(a)∨S(b)
D.
P(x)∧S(x)