血清抗HTLV－1抗体是诊断下列哪种血液系统疾病的重要依据（） A.急性淋巴细胞白血

— Has the doctor arrived yet?

— No, she _____ an hour ago. [ ]

A. has to come

B. ought to have come 

C. should come

D. used to come

The privacy of members of organizations has been invaded through the creation and maintenance of data files of computers.

对脑组织有保护功能，且能防止脑血管痉挛的药物是()。

A．硝苯地平

B．倍他乐克

C．尼莫地平

D．硝酸甘油

E．多巴胺

瓦块式保温制品的拼缝宽度不得大于（）。

A．5mm

B．10mm

C．50mm

D．15mm

纳洛酮和烯丙吗啡的相同点，在于它们均属于

A．非麻醉性镇痛药

B．止咳药

C．致幻觉剂

D．麻醉性镇痛药

E．麻醉性镇痛药拮抗剂