HIV初次感染人体后，病人血清中最早出现的抗体是（）。 A.抗HIV核心蛋白p24抗

TCBS琼脂属于（）

A.基础培养基

B.营养培养基

C.鉴别培养基

D.选择培养基

E.特殊培养基

In some western countries, demand for graduates from MBA courses has _________.

A．turneddown

B．turnedover

C．fallendown

D．fallenover

间接创意法是指直接揭示广告内容，体现广告重点的创意方法。

了解骨肿瘤对软组织、软骨的破坏情况，最好选择（）。

A.X线片

B.CT

C.MRI

D.骨扫描

E.以上均可

You are trying to determine what cost and schedule trade-off will be most appropriate for your project. You have the option to select either a more experienced person at $120 per hour who can do the task in 45 days or a less experienced person at $80 per hour who can do the same task in 65 days. A tool you can use to facilitate making the decision is （）.

A．cost of quality

B．cause-and-effect diagram

C．design of experiments

D．network diagrams