设浮点数阶码为4位补码，尾数8位原码，首位均为符号位，底数为2，求数-11011.01的浮点数表示形式，阶码，尾数分别是多少？
-11011.01=-(1.101101)×2^4=(-1)^S×(1.M)×2^e
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