A:beef
B:bread
C:bed
497÷5<100.
—What do you think of the book, Nancy?
—I think it's both useful and _______.
“三月的横断山区,山顶白雪皑皑,山脚百花争艳”,说明气温分布受( )影响。
下列国家中,哪个是信仰佛教的( )