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- 1Hangzhou is very f______ for West Lake.
- 2until与unless的区别? 例如:You will not pass the exam____you study hard. A. until B. unless
- 3下列反应中,属于加成反应的是 ( ) A.CH3Cl+Cl2→CH2Cl2+HCl B.CH2=CH2+HClO→HOCH2-CH2Cl C.SO2+2NaOH→Na2SO3+H2O D.+Br2催化剂+HBr
- 4已知a-b=2,b-c=1代数式a2+b2+c2-ab-bc-ca的值为多少,
- 5已知函数y=tanωx(ω≠0)在区间(-π,π)上是增函数,求实数ω的取值范围
- 6长方形长是12分米,是宽的150%,长方形的周长和面积
- 7The men are our teachers.
- 8He acted as if he had never seen a plane before in his life.
- 9《养花》课文片段阅读
- 10从1开始的自然数中,把能表示成两个整数的和与它的差的乘积的数从小到大排,第1998个数是多少?