Unit15Learning单元检测B——阅读理解提速练Ⅰ.阅读理解A(2018湖北省鄂西北联考)Ithappenstomostfirst-timefishkeepers.Theyruntoafishstore,pickoutthebest-lookingfish,andgetallthethingstheyneedfortheirtanks.Thentheyfilluptheirtanksandputtheirfishinthewater.Overthecourseofthenextweek,theirfisharentlookingsogood.Thenallofasudden,alloftheirfishstarttodieoff.Luckily,thereisanexplanation.Ammonia(氨)andnitri...
