未分类题The scientists ______ the mystery of the double helix, the scope for genetic engineering dramatically increased.A.having solvedB.after being solvedC.solvingD.solved
未分类题Our difference, ______, is one of method, not one of principle.A.which I seeB.as I see itC.that I seeD.I see
未分类题The students were so fascinated by the______Yangtze River that they spent hours sitting on its bank and gazing at the passing boats and rafts.A.medianB.mightyC.measurableD.maximal
未分类题Many of our men are off work with colds just now. We have been______with a skeleton staff.A.getting onB.coming onC.carrying onD.keeping on
未分类题I really dont know how to______ the problem.A.copeB.dealC.tackleD.dispose