完型填空2Germs(细菌)areeverywhere.Theyareverysmallandyou 1 se...
问题详情：完型填空2Germs(细菌)areeverywhere.Theyareverysmallandyou1seethem.Theyareliketheseedsofplants,buttheyare2.Therecouldbehundredsofthemonthepointofaneedle(针).Wecannotseethegerms3,butwecanseethemw...