外部印鉴卡上各栏需填写清晰工整、完整无误，开户时印鉴卡正面除（）外均为必填项。A.注

He was known to have been hanging about and was not expected to pass the test. ______, his failure came as no wonder to his parents.

A．However

B．Instead

C．Besides

D．Therefore

韩愈在《调张籍》中高度赞誉李白、杜甫的名句是“李杜文章在，（）。”

高血压伴肾功能不全、高血钾时，选用哪类药物应慎重（）

A.利尿剂

B.ACEI

C.β受体阻滞剂

D.α₁受体阻滞剂

E.钙拮抗剂

下列哪一项不属于肩周炎的病因（）

A.慢性劳损

B.肝肾不足

C.风寒湿邪侵袭

D.气血瘀滞

E.气血不足

简述档案作用的规律。