洋葱、番茄、草履虫等生物体都是由许多细胞组成的．______改：______．-生物

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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
• 在显微镜下观察草履虫时，能够观察到（）A．细胞质静止不动B．正在以出芽生殖方式进行繁殖C．多个大小不同的食物泡D．正在通过表膜吸收氧气，排除二氧化碳-生物
• 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-
• 草履虫的运动器官是纤毛．______．-生物
• 下图①～④为各种生物的结构简图．不具有细胞结构的是（）A．①B．②C．③D．④-生物
• 根据如图草履虫结构示意图，回答下列问题：（1）草履虫能借助于[]的摆动在水中旋转前进．（2）草履虫的消化是在[]中进行的．食物残渣是由[]排出体外的．（3）[]能收集体内多余的水分和-生物
• 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
• 教材第四十八页的变形虫实验主要说明[]A．细胞核是细胞生命活动的控制中心B．被分割成有细胞核部分几天后死亡C．被分割部分无细胞核部分几天后死亡D．A、C正确-七年级生物
• 如图为草履虫的形态结构示意图，据图回答下列问题：（1）草履虫对氧气的摄入和二氧化碳的排出是通过[]_______来完成的，它相当于细胞结构中的_________，起保护细胞内部和_____-七年级生物
• The physics teacher said light _______ faster than sound. [ ]A. go B. travels C. went D. travelled -
• 以下为多细胞生物的是[]A．变形虫B．衣藻C．草履虫D．洋葱-八年级生物
• —There are too many "problem children" in our school. Many teachers are anxious about it.I
• 下列除哪项外其他都是单细胞生物[]A．衣藻B．草履虫C．变形虫D．玉米-七年级生物
• 生物种类多种多样，不仅有多细胞的，也有单细胞的，下列只有一个细胞的生物是[]A．松树B．马C．小麦D．草履虫-八年级生物
• 下列不属于单细胞生物的是[]A．小球藻B．水绵C．草履虫D．变形虫-七年级生物
• Could you please tell me ______ get to No.2 Middle School? [ ]A．what can I B．how can I C．how I can D
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• — I seem to be lost. Could you tell me ______? — Sure. You can take the No.3 bus to get there. [ ]A.
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• — Excuse me, could you tell me ______ a book about music? — Sure. They are on the second floor. [ ]A
• 下列动物属于单细胞动物的是[]A．草履虫B．珊瑚虫C．小麦线虫D．涡虫-八年级生物
• —What did the headmaster come here for? —He wanted to know ______. [ ]A. what the girl's name w
• 下列不属于单细胞生物的是[]A．草履虫B．蝗虫C．酵母菌D．衣藻-七年级生物
• You must remember ______. [ ]A. what your teacher said B. what did your teacher say C. your teacher
• Would you tell me ______?[ ]A. where is the shop B. where the shop is C. where are the shop D. where
• There are so many kinds of Mp3 in the shop. We can't decide . [ ]A. what to buy B. to buy what
• 根据第一句的意思，完成第二句，使其意思相同或相近。每空填一个单词。1. I think his suggestions are valuable for my study.I think ______
• Would you show me ______ an e-mail, please? [ ]A. how to make B. how to send C. which to make D. whe
• I asked the girl ______. [ ]A. which one she liked best B. which one did she like best C. which one
• 下列单细胞生物中，能净化污水的是[]A．酵母菌B．草履虫C．疟原虫D．变形虫-七年级生物
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• 1665年，英国科学家罗伯特·虎克将软木塞的薄片放在自制的光学显微镜观察发现了细胞。到19世纪30年代，德国科学家施莱登和施旺分别对植物和动物进行深入的研究，提出动物和植-七年级生物
• I hope Tina ______ to my birthday party on time next Wednesday. [ ]A. to come B. come C. came D. wil
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• — Would you please tell me ______? — At 10:00 this evening. [ ]A. when will the train leave B. when
• There is not many differences between the two. I really don't know ________.[ ]A. what should I
• 下列哪一单细胞生物细胞里含有叶绿体，能进行光合作用？[]A．酵母菌B．草履虫C．衣藻D．变形虫-七年级生物
• Kangkang is asking Mr. Lee_____about Shenzhou VI. [ ]A. that he will tell him something B. when will
• 下列不属于单细胞生物的是[]A．病毒B．酵母菌C．细菌D．草履虫-七年级生物
• 选择填空。 Can you tell me ______ country is north of the U.S., Lily? [ ]A. where B. when C. what D. how
• Father asked Edison ________ doing that for. [ ]A. how is he B. what he was C. why was he D. where h
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• —Do you know if he________ to play football with us?—I think he will come if he _________ free tomo
• 下列生物属于单细胞生物的是[]A．海带B．蜗牛C．蚯蚓D．衣藻-七年级生物
• They will try their best in the Dragon Boat Racing _______ they may fail.A．ifB．thoughC．untilD．when-九
• —Will you come to the dinner party?— I won’t come unless Jenny____.A． will be invitedB． can be invit