完型填空2Germs(細菌)areeverywhere.Theyareverysmallandyou 1 se...
問題詳情：完型填空2Germs(細菌)areeverywhere.Theyareverysmallandyou1seethem.Theyareliketheseedsofplants,buttheyare2.Therecouldbehundredsofthemonthepointofaneedle(針).Wecannotseethegerms3,butwecanseethemw...