我国历史上第一次大规模的农民起义爆发于[ ]
A．公元前221年
B．公元前209年
C．公元前207年
D．公元前202年
答案：B
A new study found ______ a teacher has anxiety about math, ______ feeling can influence how his or her female students feel about math.
A．when that; which
B．that when; that
C．that if; which
D．if that; that
企业短期融资券的最长期限不能超过( )天。
A．180 B．270 C．365 D．545
