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【简答题】
物质的跨膜运输对细胞的生存和生长至关重要。下图表示的几种物质经过细胞膜的运输方式，请据图回答问题： 图示中细胞膜主要由[ ]（）和[ ]（）组成，其中[ ]（）的种类和数量与细胞膜功能的复杂性有关。
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皮皮学刷刷变学霸
举一反三
【单选题】货币政策的信用传导机制通过( )。 I、银行信贷渠道 II、企业资产负债表渠道 III、财富效应 IV、生命周期
A.
Ⅰ、Ⅱ
B.
Ⅱ、Ⅲ
C.
Ⅲ、Ⅳ
D.
Ⅰ、Ⅱ、Ⅲ、Ⅳ
【简答题】Home Alone It was Sunday afternoon. My brother and I were alone at home. My parents went for a party and asked me to look after my brother. I was doing my homework while my younger brother was watchi...
【简答题】(review)_______ his lessons. My brother went to bed, my brother went to bed.
【多选题】缺乏可导致贫血的物质有 ( )。 A. 维生素 A B. 维生素 C C. 维生素 D D. 叶酸 E. 尼克酸
A.
维生素 A
B.
维生素C
C.
维生素D
D.
叶酸
E.
尼克酸
【简答题】完形填空 It was Sunday afternoon. My brother and I were alone at home. My parents went for a party and asked me to look after my brother. I was doing my homework while my younger brother was watching TV...
【简答题】It was Sunday afternoon. My brother and I were alone at home. My parents went for a party and asked me to look after my brother. I was doing my homework while my younger brother was watching TV. Sudde...
【简答题】完型填空。 It was Sunday afternoon. My brother and I were alone at home. My parents went for a party and asked me to look after my brother. I was doing my homework while my younger brother was watching TV....
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