小明用PyTorch实现了一个CNN网络结构，以下关于此网络结构描述正确的是哪个选项？conv1 = nn.Conv2d(in_channels=3, out_channels=16, kernel_size=3, stride=1, padding=1)
pool = nn.MaxPool2d(kernel_size=2, stride=2, padding=0)
fc1 = nn.Linear(32 * 8 * 8, 128)
fc2 = nn.Linear(128, 5)
x = torch.randn(1, 3, 32, 32)
x = pool(F.relu(conv1(x)))
x = F.relu(fc1(x))
x = fc2(x)
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