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【单选题】
病原菌侵入机体后,只在侵入部位繁殖,不入血流,但其释放的外毒素可入血, 引起特殊的毒性症状称为( )A.
菌血症
B.
败血症
C.
毒血症
D.
脓毒血症
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【单选题】For David, the marginal utility from an additional car is 2,000 units and the marginal utility from an additional vacation is 1,000 units. David is allocating all his budget. Hence to maximize his uti...
A.
shift his consumption from the vacation to the car.
B.
shift his consumption from the car to the vacation.
C.
save his budget by not spending it until he can afford both the car and the vacation.
D.
buy both the car and the vacation now.
E.
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