硬下疳(chancer)

To compensate for the substantial decline in the availability of fossil fuels in future years, we will have to provide at least an ______ alternative energy source.

A．anticipated

B．official

C．equivalent

D．emotional

有哪些措施可预防和控制HIV传播？

Because time in India is conceived statically rather than dynamically, Indian languages emphasize nouns rather than verbs, since nouns express the more ______ aspects of a thing.

A．paradoxical

B．prevalent

C．temporal

D．stable

In the (nineteenth) century, people (lived in) the northern area grew (their) crops on river (bottom lands).

A．nineteenth

B．lived in

C．their

D．bottom lands

简述实行工程量清单计价的作用。