These trees (plant) by students last year.
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JoeSandershasthe 1gardeninourtown.Nearlyeverybodyentersfor'TheNicestGardenCompetition'eachyear,butJoewinseverytime.BillFrith'sgardenis2thanJoe's.Billworks3thanJoeandgrows4flowersandvegetables,butJoe'sgardenismoreinteresting.Hehasmadeneatpathsandhasbuiltawoodenbridgeoverapool.Ilikegardenstoo,butIdonotlikehardwork.EveryyearIenterforthegardencompetitiontoo,andIalwayswinalittleprizefor5gardeninthetown!
请按照要求变换句子形式。1. I liked rock music last year. (变否定句)2. She didn't chat with me yesterday. (变肯定句)3. We took a walk after supper yeaterday evening. (变一般疑问句)4. We saw a movie last weekend. (对划线部分提问)5. My favorite subject was English last year.(对划线部分提问)
风管系统安装完成后,必须进行_______和 _______试验,合格后方能交付下道工序。
A. 压力试验
B. 强度试验
C. 严密性试验
D. 气密性试验