挑战习题
1/4单选题
难度：

1.在三角形ABC中，若∠A=60°，∠B=45°，BC=，则AC=（）
A
B
C
D
提示1：
IDxpbWcgd2lkdGg9NjIgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDIvNjgvckJBQ0psUTdvWjdSa2xzMUFBQUNJRnNmdVdJMDMzLnBuZyI+
提示2：
IHNpbkE9c2luNjDCsD08aW1nIHdpZHRoPTEyIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzQ2LzI2L3JCQUNGRlE3b1o3QXlLSWFBQUFCWUFKbmNPVTQ3OC5wbmciPu+8jHNpbkI9c2luNDXCsD08aW1nIHdpZHRoPTEyIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzAyL0JCL3JCQUNKMVE3b1o2Z2ZweExBQUFCVXRQVTYwWTIwMi5wbmciPu+8jEJDPTxpbWcgd2lkdGg9MjUgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDIvQkIvckJBQ0oxUTdvWjJ6d3MwT0FBQUJsRFczN1h3NDc2LnBuZyI+
正确答案：Qg==
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

提示0/2

A

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