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【简答题】
用符号“∈”或“∉”填空: (1) 0 {0};(2) 3.14 R;(3)π Q;(4)0 ; (5)a {a,b,c};(6)3 N;(7) ;(8) R .
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举一反三
【单选题】Nobody taught _____ Chinese. He learned all by ______. What a clever boy!
A.
himself; him
B.
him; himself
C.
his; himself
D.
his; him
【简答题】阅读理解. Douglas Corrigan had a dream. He wanted to fly a plane across the Atlantic Ocean by himself. He bought a used airplane. Then he asked for permission (允许) to fly it across the ocean. People from ...