若用呼吸酶抑制剂处理小肠绒毛上皮，则会明显影响细胞吸收的物质是（）
A.氧气、甘油
B.脂肪酸、水
C.葡萄糖、水
D.钾离子、氨基酸
参考答案：D
解析：小肠绒毛上皮吸收氧气、甘油、脂肪酸、水是通过自由扩散，无需能量；吸收葡萄糖、钾离子、氨基酸是通过主动运输，需要能量。而能量有细胞呼吸提供，呼吸酶抑制剂会抑制细胞呼吸提供能量，故会影响主动运输，故选D。考点：本题考查物质跨膜运输方式，意在考查考生能理解所学知识的要点，把握知识间的内在联系能力。
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| I sent copies of the draft of my last book to both my sisters. Naomi, the oldest, read it and sent me detailed (详细的) and helpful __1__. Mimi kept it a while, and then told me that she had begun reading it but hadn't gotten very __2__. She realized that she'd rather give me a necklace of glass beads (珠子) that she made. I couldn't have been more __3__. The necklace is beautiful, and wearing it __4__ me of Mimi's loving __5__, as well as her __6__, so different from mine. I have another reminder of Mimi's support: an e-mail message that I have __7__ over my writing desk. It __8__: "Stop reading this, and go back to writing your book. Love, Mimi." This __9__ makes me smile- and get back to work- whenever I glance at it. Naomi is always __10__ me, too, in her different way. __11__ each of my books __12__, I appeared on television, and my parents would be sure to __13__. I always knew that when I arrived home, the light on my answering machine __14__ be blinking, (闪烁) and when I __15__ "play" I'd heard my mother's voice saying __16__ like: "I loved watching you, you were wonderful, I'm proud of you!" My mother died while I was writing my previous book. The first time I arrived home after a television __17__, I was afraid of walking past the dark, __18__ answering machine. But the __19__ light was __20__. I pushed "play"- and heard Naomi's voice: "I loved watching you, you were great, I'm so proud of you." | ||||
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H3O++ S2－
Al(OH)3(胶体) + 3H+
＋H＋＋OH－===BaSO4↓＋H2O