寰峰煄鍖?/p>
2018
骞村涓氭按骞宠�冭瘯鏁板妯¤瘯鍗?/p>
涓�銆?/p>
閫?/p>
鎷╅
(
姣忓皬棰?/p>
4
鍒嗭紝鍏?/p>
48
鍒?/p>
)
1
锛庯梗
鐨勭浉鍙嶆暟鏄紙
锛?/p>
A
锛?/p>
5
B
锛?/p>
C
锛庯梗
D
锛庯梗
5
2.
涓嬪垪鍥惧舰涓紝鏃㈡槸杞村绉板浘褰㈠張鏄腑蹇冨绉板浘褰㈢殑鏄?/p>
(
)
3
锛庡凡鐭ョ┖姘旂殑鍗曚綅浣撶Н璐ㄩ噺鏄?/p>
0.001 239g/cm
3
锛屽垯鐢ㄧ瀛﹁鏁版硶琛ㄧず璇ユ暟涓?/p>
锛?/p>
A
锛?/p>
A
锛?/p>
1.239
脳
10
锕?/p>
3
g/cm
3
B
锛?/p>
1.239
脳
10
锕?/p>
2
g/cm
3
C
锛?/p>
0.123 9
脳
10
锕?/p>
2
g/cm
3
D
锛?/p>
12.39
脳
10
锕?/p>
4
g/cm
3
4
锛庡鍥撅紝绔嬩綋鍥惧舰鐨勪刊瑙嗗浘鏄紙
C
锛?/p>
A
锛?/p>
B
锛?/p>
C
锛?/p>
D
锛?
5
锛庝粠
2
锛?/p>
0
锛?/p>
蟺
锛?/p>
3.14
锛?/p>
6
杩?/p>
5
涓暟涓殢鏈烘娊鍙栦竴涓暟锛屾娊鍒版湁鐞嗘暟鐨勬鐜囨槸
(
C
)
A.
1
5
B.
2
5
C.
3
5
D.
4
5
6.
涓嬪垪璁＄畻涓纭殑鏄紙
B
锛?/p>
A.
a鈥
2
=a
2
B.
2a鈥=2a
2
C.
锛?/p>
2a
2
锛?/p>
2
=2a
4
D. 6a
8
梅3a
2
=2a
4