为评价某种一级预防措施控制冠心病发病的效果，最适合的研究方法是（） A.前瞻性队列研

精度衰减因子越大，点位误差越（）.

A.大

B.小

C.相同

D.无关

柜员查询某一客户编号下所有定期账户的明细信息时，启“1694定期存款账户归户查询”交易，输入客户编号和币别代码，交易成功后，系统返显该客户编号下指定币别的全部定期存款账户内容。（）

Which of the following groups is defined as "newlyweds" a. Couples who are married for less than two years. b. Couples who are married for less than five years. c. Couples who are married for more than five years. d. Couples who are married for more than twenty years.

下列哪一种先天性心脏病可能出现水冲脉及枪击音（）

A.房间隔缺损

B.室间隔缺损

C.动脉导管未闭

D.法洛四联症

E.艾森慢格综合征

NAP活性明显增高见于（）。

A.急淋白血病缓解期

B.慢粒白血病慢性期

C.恶性淋巴瘤Ⅳ期

D.类白血病反应

E.多发性骨髓瘤