The economy of Dallas, Texas, is strong and diversified .
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Inliterature,caricatures讽刺画usuallycontainverbalexaggerationthroughwhichthewriterachievescomicandoftensatiric讽刺effects.
Thefirstpaperwasmadefromthebarkofthemulberrytree.
Thecontrolsofmostmodernairplanescanbeoperatedeithermanuallyorautomatically.
Somechildrendisplayanunquenchable难以抑制的curiosityabouteverynewthingtheyencounter.
Eyespots,themostrudimentaryeyes,arefoundinprotozoan原生动物flagellates鞭毛虫,flatworms扁形虫,andsegmentedworms片段蠕虫.