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2020
骞村皢绐佸嚭鑰冩煡鎭掔瓑鍙樻崲涓庝笁瑙掑嚱鏁板浘璞″拰鎬ц川鐨勭粨鍚堛�佹亽绛夊彉鎹笌姝ｅ鸡瀹氱悊鍜屼綑寮﹀畾鐞嗙殑缁撳悎
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涓�銆佸崟閫夐
1
锛?/p>
锛?/p>
2020
灞婂北涓滅渷娼嶅潑甯傞珮涓変笂鏈熶腑锛?/p>
sin
225
飩?/p>
飥?/p>
锛?/p>
锛?/p>
A
锛?/p>
1
2
飥?
B
锛?/p>
2
2
飥?
C
锛?/p>
3
2
飥?
D
锛?/p>
1
飥?/p>
銆愮瓟妗堛�?/p>
B
銆愯В鏋愩�?/p>
鍥犱负
2
sin
225
sin(180
45
)
sin
45
2
飥?/p>
飥?/p>
飥?/p>
飥?/p>
飥?/p>
飥?/p>
o
o
o
o
.
鏁呴�夛細
B.
2
锛?/p>
锛?/p>
2020
灞婂北涓滅渷娉板畨甯傞珮涓変笂鏈熸湯锛?/p>
鈥?/p>
1
a
飥?/p>
飥?/p>
鈥?/p>
鏄?/p>
鈥?/p>
0
x
飥?/p>
飪?/p>
R
锛?/p>
0
sin
1
0
飥?/p>
飥?/p>
a
x
鈥?/p>
鐨勶紙
锛?/p>
A
锛庡厖鍒嗕笉蹇呰鏉′欢
B
锛庡繀瑕佷笉鍏呭垎鏉′欢
C
锛庡厖瑕佹潯浠?/p>
D
锛庢棦涓嶅厖鍒嗕篃涓嶅繀瑕佹潯浠?/p>
銆愮瓟妗堛�?/p>
A
銆愯В鏋愩�?/p>