鑻ュ皢閾佸潡A缃?簬姘翠腑锛屽?鍥句箼鎵?绀猴紝浠嶇敤璇ユ粦杞?粍灏嗗叾鍦ㄦ按涓?寑閫熸彁鍗嘃st1:chmetcnv TCSC= 0 NumberType= 1 Negative= False ——青夏教育精英家教网—

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lang=EN-US>) (1)鐢佃兘琛ㄣ?佹俯搴﹁?(1鍒咟span lang=EN-US>) (2)a锛庤?瀵熺數鑳借閾?墝鍙傛暟N(r锛廃span lang=EN-US>kW锛嶞span lang=EN-US>h)锛岀數姘村6瀹圭НV(m3)锛汓span lang=EN-US> b锛庣數姘村6涓?洓婊℃按锛岀敤娓╁害璁℃祴鍑烘按鐨勫垵娓?span class=SpellE>tl(榧?紱 [鑻ョ數姘村6涓?湭璇存槑鐩涙弧姘达紝闄ゅ湪绗?span lang=EN-US>1闂?腑娣诲姞浣撶Н鎴栬川閲忔祴閲忓伐鍏峰?锛庤繕瑕佸湪姝?span lang=EN-US> 椤′腑浣撶幇浣撶Н鎴栬川閲忕殑娴嬮噺] c锛庡叧闂??涓?叾瀹冪敤鐢靛櫒锛屽皢姝ゆ按澹跺崟鐙?帴鍏ョ數璺?腑锛岃?褰曠數鑳借杞?洏杞?繃鐨勮浆鏁?span lang=EN-US>n(r) 鍜屾按鐨勬湯娓?span lang=EN-US>t锛孅span lang=EN-US>锛嶞span lang=EN-US> [杩囩▼2鍒嗭細娴嬪嚭V銆?span lang=EN-US>t锛屻??span lang=EN-US>t21鍒嗭紱瑙傚療N銆佹祴鍑裹span lang=EN-US>n1鍒咟span lang=EN-US>] (3)褰卞搷鍥犵礌(2鍒咟span lang=EN-US>)锛氣憼姘寸殑浣撶Н锛涒憽姘寸殑娓╁害宸?紱鈶↑span lang=EN-US>n涓嶞span lang=EN-US>N鐨勬瘮鍊硷紟 [娉?細浠ヤ笂鍥犵礌涓?憼銆佲憽姣忔潯0锛嶞span lang=EN-US>5鍒嗭紱鈶↑span lang=EN-US>1鍒嗭紱鏁板?琛ㄨ揪寮忔?纭?殑鍓嶆彁涓嬶紝婊″垎2鍒嗭紱鏁板? 琛ㄨ揪寮忛敊璇?紝婊″垎1鍒咟span lang=EN-US>] 鏂规硶(--)锛欬span lang=EN-US>(婊″垎6鍒咟span lang=EN-US>) (1)鐢靛帇琛ㄣ?佺數娴佽銆佹俯搴﹁?銆佺?琛?span lang=EN-US>(1鍒咟span lang=EN-US>) (2)a锛庤?瀵熺數姘村6瀹圭НV(m3)锛汓span lang=EN-US> b锛庣數姘村6涓?洓婊℃按锛岀敤娓╁害璁℃祴鍑烘按鐨勫垵娓?span lang=EN-US>t锛孅span lang=EN-US>锛汓span 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题目列表(包括答案和解析)

2、下列物体中，在通常情况下属于绝缘体的是（　　）

A、铅笔芯

B、铁棒

C、塑料

D、硫酸铜溶液

查看答案和解析>>

3、演奏同一乐曲时，人能分辨出二胡和小提琴发出的声音，主要是因为它们的（　　）

A、响度不同

B、音调不同

C、音色不同

D、节奏不同