在一个生态系统中，各种生物生命活动所需的能量，最终来自于（）A．太阳能B．有机物C．光合作用D．化学能-生物

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• 小医生，下列各句均有一处错误，请找出并改正。1.At the head of the queue was two old women.__________2.You don't need t
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• －Is that Mary?－No, it _______be her. She has gone to Tokyo. A．can’tB．mayC．needn’tD．mustn’t-九年级英语
• Wang Mei ____ her mother because she is beautiful and intelligent.[ ]A. lookB. likedC. is like D. lo
• ______ his birthday March 6th?[ ]A. WhenB. How old C. Is D. Does-七年级英语
• It’s time _____ class. You must _____ the classroom.A．to; to goB．for; go toC．to; to goD．for; to go-七
• —Must I clean my room now, Mum?—_______. You can do it tomorrow.A．No, you needn’t B．No, you mustn’tC
• Did you walk such a long way on such a hot day? You _______ be tired and thirsty. [ ]A. can B. must
• 你能用绘图的方法，说明在池塘生态系统中能量流动是怎样进行的吗？-八年级生物
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• —Look! A book is on the floor. Whose is it?—It ______ be Rick’s. It has his name on it.A．mustn’tB．ca
• 绿色植物作为生命角色（），通过食物链、食物网养育了其他生物（）A．生产者B．消费者C．分解者D．非生物成分-七年级生物
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• A: Where ________ their books ? B: Sorry , I don't know . [ ]A. isB. am C. are-七年级英语
• — _________ I use your telephone?— Yes, of course.A．WouldB．MayC．ShouldD．Must-九年级英语
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• There's something wrong with my radio. Can it _____? [ ]A. be mended B. is mendedC. was mended
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