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һѡ⣨12С⣬ÿС3.ÿСĸѡУֻһĿҪ
1.ijһ8棬-2棬õ²ǣ A.10
B.-10
C.6
D.6
2.2018ǴӮƶսж֮.ͳƾ215շʾ2018ĩȫũƶ˿ڱĩ1386ˣ1386ÿѧʾӦΪ A. 0.1386?10 B. 1.386?10
87C. 1.386?10
8D. 1386?10
43.ͼ7ͬСڳɵļ.ߺü壨
A.ͼı䣬ͼı B.ͼı䣬ͼı C.ͼ䣬ͼı D.ͼ䣬ͼ
4.бAB¶i?1:3½?Ķǣ A.30
B.45
C.60
D.ȷ
5.ͼʾӱ߳ΪaĴȥһ߳bСΣСͼ1еӰƴһͼ2ʾľΣһ֤̿
A. a?b?2ab?(a?b) B. a?b?2ab?(a?b) C. 2a?3ab?b?(2a?b)(a?b) D. a?b?(a?b)2222222222(a?b)
??141275?3?486.????ĵĽǣ 3??A.6
B. 43 C. 23?6
???D.12
7.ͼ֪ABCDƵA˳ʱת֪ABCDλãתΪa0??a?90?.
???1?112??aĴСǣ
A.32
B.20
C.22
D.28
8.֪P(3?3a,1?2a)ڵޣaȡֵΧϱʾȷǣ
A. B. C. D.
?9.ͼABeOֱDCeOϣADBDDCAC?BAD?25ô?CĶǣ
A.759
B.65
C.60
D.50
10.ͼСֵ»á߶ȵʾͼ.վöˣߴӵCƽ澵պ䵽¥µĵ߸A㴦֪AB?BDCD?BDղAB?1.2ףBP?1.8ף
PD?24ףôôõĸ߶ԼΪС߶ȣ
A.8
B.16
C.24
D.36
11.ͼABCDУAB?13ԽAC?10AAE?BCΪEAEijΪ
A.8
B.
60 13C.
120 13D.
240 1312.СӼҳڹһʱԭ·أͬʱСְִӹС·߷ؼ.ͼҵľyףСʱx֣֮ĺͼ.нвȷǣ
A.С1600 B.С
25Ӻְֵһ 3C.Сְֵڶʱҵľ960 D.СڹͣʱΪ5
ѡ⣨84֣
⣬5С⣬ÿС3֣15ֻ֣Ҫд
13.ͼѱ߳Ϊ1һصãOΪԲģԽOBΪ뾶满ڵA.AӦ__________.
14.һϡСᣬǵ˳ŷţǡΪϡСµĸ__________.
215.һֱȵԲڷһ.֪ıʽΪSn?4?rrΪ
İ뾶.ôԲııΪ__________.