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- 1算24点1456
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- 3某人用托盘天平称量5.1克食盐时(1克以下用游码),称后发现砝码放在左盘,食盐放在了右盘.所称食盐的实际质量为( ) A.5.3g B.5.1 g C.5.0 g D.4.9 g
- 4求函数y=sin2x+2sinxcosx-cos2x的周期和值域
- 5在水平光滑金属板上方,固定有一个带电量为+Q的点电荷,现有一个很小的表面绝缘的带负电滑块,
- 6I play ()my classmate .介词填空
- 7(数学)方程有两个异号根
- 8how old she is是什么结构
- 9为什么ATP是磷酸果糖激酶的底物,却又是它的抑制剂?
- 10读万卷书行万里路作者是