—I've bought all the food for the party tonight.—Thank you. Then I _______ go to the supermarket.

题干

—I've bought all the food for the party tonight.

—Thank you. Then I _______ go to the supermarket.

A：can't

B：mustn't

C：shouldn't

D：needn't

上一题下一题 0.0难度选择题更新时间:2018-10-23 09:11:32

根据下列表格中y=ax²+bx+c的自变量x与函数值y的对应值，判断方程ax²+bx+c=0（a≠0，a，b，c为常数）的一个解x的范围是____．

x	6.17	6.18	6.19	6.20
y=ax²+bx+c	﹣0.03	﹣0.01	0.02	0.04

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