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

单项选择题 High-tech executives are also counting ___ competitive pressure forcing corporations to continue spending on information technology even in a recession.inC、 offD、 out

单项选择题 The history of information-technology industries is ____ smooth.butB、 nothing butC、 all butD、 not but that