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变式 2 : 正 四棱锥 侧棱 长为 , , 则其 的 表 面积 为 ______
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【单选题】红细胞血型所涉及的特异物质类型是（ ）。【2005年考试真题】
A.
红细胞膜上凝集素
B.
红细胞膜上凝集原
C.
红细胞膜上受体
D.
血浆中凝集素
E.
血浆中凝集原
【简答题】完形填空。 A: Excuse me, Jim. Who's the boy 1 the playhouse? B: Which boy? There are five 2 over there. A: The one in a brown T-shirt. B: Oh, 3 Joy's brother, David. A: Who's David? B: He's 4 friend. We're...
【简答题】综合填空。 A: Excuse me, are you Li Lei? B: Yes, I am. 1 A: My name is Jim. B: 2 A: Nice to meet you, too. B: 3 A: I’m from Canada. Are you from Beijing? B: No. I’m from Shanghai. A: Is that boy from Shang...
【简答题】完成对话：在对话后面的句子中选出正确的填入空白处。 Jim: Excuse me, Ann. Whose black dog is this? Is it yours? Ann: Let me have a look. 1. . I think it's Sam's. My dog is brown. Jim: Sam, look at the dog behind the tree. 2. ? ...
【简答题】补全对话。 A: Excuse me, where's Jim? __ 1 __ B: He's gone to Austrlia. A: __ 2 __ B: He went last month. A: __ 3 __ B: Yes. He had lived there for 15 years before he came to China. A: __ 4 __ B: He trave...
【简答题】在张承志看来,小说应当是 ,小说应当是 ,小说应当是 。
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