单项选择题 To some degree, a meeting of global leaders may be necessary to ___ the task force's mandate.rectifyC、 certificateD、 prove

单项选择题 Government figures show consumer spending on computers rising at its slowest rate since 1992, while unfilled orders for information-technology equipment are ______for the first time since 1994.

单项选择题 The biggest high-tech downturn in the past two decades came in 1985, when demand_____ just before the introduction of Intel’s 80386 microprocessor.outB、 petered outC、 came into beingD、 disappear