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1.下列以为自变量的函数中,是指数函数的是(    )
A:
B:
C:
D:
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  • 提示2IOaMh+aVsOWHveaVsDxpbWcgd2lkdGg9NDEgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRTQvODUvckJBQ0ZGUUpZVnZ6M1pGekFBQUJxM2l2bnhvMjIyLnBuZyI+55qE57O75pWw5pivMQ==
  • 提示3IDxpbWcgd2lkdGg9MTEwIGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0U0Lzg1L3JCQUNGRlFKWVZ2U0FtdDBBQUFDYjNMbmlFWTYyMC5wbmciPg==