图中，能正确表示植物根细胞K+ 吸收量与有关因素关系的是（ ）
An _____ invented this bicycle. A. Chinese B. American C. English
This old woman _____ have food. A. did B. didn’tC. don’t
When did they _____ ? A. comeB. cameC. comes
What _____ to you? A. happenB. matterC. happened
What did you _____ ? A. sawB. seeC. bought
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