人民币对公一户通的主账户对账单不体现分账户余额，使用现有对账单的格式，分账户只出具对账清单，不出具对账单。（）
参考答案：对
Years ago we didn't know this, but recent science _____ that people who don't sleep well soon get ill. [ ]
A. showed
B. has shown
C. will show
D. is showing
有10道是非题，要从统计上(99%的把握)判断一个被试是否因猜测因素答对，他至少应正确回答的题目数是（ ）
A．5道
B．6道
C．7道
D．8道
