题目内容
（请给出正确答案）
[主观题]
We couldn't really afford to buy a house so we got it on martgage purchase and paid monthl
y ______.
A．investments
B．requirements
C．arrangements
D．installments
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大鼠急性经口染毒，为了准确地将受试物给入消化道内，多采用
A．喂饲
B．灌胃
C．吞咽胶囊
D．鼻饲
E．饮水
