Recently I am busy writing a guide and the guide describes ______.[ ]A. how I think wilt life on Mar

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• 绝大多数生物都具有细胞结构，下列属于单细胞生物的是[]A．丹顶鹤B．山羊C．柳树D．草履虫-七年级生物
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• －Can you tell me Kitty’s address.－I don’t know, either. But I’ll tell you her address as soon as she
• My sister isn’t in. ________ she comes back, I’ll let her call you back. A．WhileB．UntilC．BeforeD．Whe
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• Though Tom just left school, _ _ he went to studying at home.[ ]A. 不填 B. yet C. but D. and-八年级英语
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• 按括号内的要求改写下列句子。1. We stopped playing basketball because of the rain yesterday morning.(改为同义句) We stop
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• 下图所示的两种生物进行运动分别依靠A．表膜和伪足B．纤毛和细胞膜C．纤毛和伪足D．表膜和细胞膜-七年级生物
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• 将下列对应项进行连线。草履虫有叶绿体衣藻无细胞壁醋酸杆菌无成形细胞核酵母菌无细胞结构艾滋病毒有细胞壁、细胞核，无叶绿体-八年级生物
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• 草履虫通过下列哪项进行呼吸？-七年级生物
• 科学家们在研究涡虫的行为实验中假设涡虫喜欢黑暗，将一只涡虫装入试管，并装满晒过的自来水，用胶皮塞好管口。然后在试管中部做一个标记，靠近试管塞的一端记为A端，另一端-八年级生物
• 请根据图回答问题：（1）图中⑧具有______的功能．图中④是______，具有______的功能．（2）在适宜的环境中，草履虫通过______进行生殖．下面是探究草履虫对刺激反应的实验：（你）从培养
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• 生物圈中还有不少肉眼很难看到的生物，它们的身体是由一个细胞构成的，称为______，如______等，大多数生活在______环境中．-生物
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• 如图是草履虫结构示意图，据图回答：（1）草履虫呼吸是通过[2]______完成的．（2）与细菌相比，草履虫在结构上的特点是______．（3）草履虫在水中运动是依靠______的摆动．（4）某同学在-
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• 如图A为植物细胞模式图，B为草履虫结构示意图．（1）A图中起支持和保护作用的是图中标号______所示结构，液泡是图中标号______所示结构．（2）B图中草履虫靠图中标号______纤毛的摆-生物
• 草履虫属于动物，而玉米属于植物，其主要依据是①草履虫细胞结构没有细胞壁②草履虫能自由运动③草履虫体内没有叶绿素，不能制造有机物④草履虫对外界刺激的反应很灵敏[]A．①②③④B-七年级生物
• 下列不属于草履虫的特征是[]A．能够自由运动B．对外界刺激反应灵敏C．具有细胞壁D．以现成有机物为食-七年级生物
• 草履虫生命活动所需要的能量来自于[]A．自身光合作用B．食物中有机物分解释放的能量C．太阳光的照射D．纤毛运动产生的能量-七年级生物
• 在草履虫的下列结构中，能完成运动功能的是：[]A．纤毛B．表膜C．伸缩泡D．食物泡-七年级生物