The poor girlacross the roada car knocked her down.A．walked; whileB．walked; sinceC．was walking; unti

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• 单细胞生物个体微小，不能完成呼吸、生殖等复杂的生命活动。-七年级生物
• ——I don’t know if he ________ tomorrow?——If it ________ , he will come.A．will come; won’t rainB．will
• If I free next Sunday, I to the farm with you.A．will be, will goB．am, will goC．am, goD．will be, go-八
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• If you _______that kind of fish, you ________very sick.A．will eat; will becomeB．will eat; becomeC．e
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• 在草履虫培养液中加入适量碳素墨水，几分钟后将草履虫制成临时装片在显微镜下观察，被染成黑色的结构最可能是A．伸缩泡B．食物泡C．细胞质D．细胞核-七年级生物
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• 以下关于草履虫的知识，正确的是A．氧的摄入、二氧化碳的排出都通过伸缩泡完成B．个体微小，要用电子显微镜观察C．草履虫趋向有利刺激是反射活动D．观察时，放置儿丝棉花纤维的目-七年级生物
• 下图是某同学在显微镜下观察到的草履虫图像，则草履虫在临时装片上的状态是-七年级生物
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• We will have no water to drink _________ we don’t protect the earth.A. until B. if C. unless-八年级英语
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• ____ are you going to be ____ you grow up?A．What, whileB．What, when C．When, how D．When, what-八年级英语
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