现在珠海白天时间一天比一天长，从（）这天开始白天就会一天比一天短。

22+6+(-10)=18(℃)。 答：这天夜间的气温是18 ℃ 。

答案：A

解析：

正确答案：AB

a1:=c>ref(c,1) and ref(c,1) >ref(c,2)  and v>ref(v,1)  and ref(v,1) >ref(v,2) ;
a2:=ma(c,60)>ref(ma(c,60),1) and ma(c,120)>ref(ma(c,120),1) and ma(c,250)>ref(ma(c,250),1);
a3:=a1 and a2;
选股1: count(a3,10)=1 and a3;

a1:=c>ref(c,1) and ref(c,1) >ref(c,2) and v>ref(v,1) and ref(v,1) >ref(v,2) ;a2:=ma(c,60)>ref(ma(c,60),1) and ma(c,120)>ref(ma(c,120),1) and ma(c,250)>ref(ma(c,250),1);a3:=a1 and a2;选股1: count(a3,10)=1 and a3; B:=VOL/MA(V,5);选股2:B>2.5 AND V/CAPITAL*100>4.5 ;选股3:cross(c,ma(c,20)) and ma(c,60)>ref(ma(c,60),1) and ma(c,120)>ref(ma(c,120),1) and ma(c,250)>ref(ma(c,250),1);

参考资料：v

a1:=c>ref(c,1) and ref(c,1) >ref(c,2)  and v>ref(v,1)  and ref(v,1) >ref(v,2) ;
a2:=ma(c,60)>ref(ma(c,60),1) and ma(c,120)>ref(ma(c,120),1) and ma(c,250)>ref(ma(c,250),1);
a3:=a1 and a2;
选股1: count(a3,10)=1 and a3;



B:=VOL/MA(V,5);
选股2:B>2.5 AND  V/CAPITAL*100>4.5 ;



选股3:cross(c,ma(c,20)) and  ma(c,60)>ref(ma(c,60),1) and ma(c,120)>ref(ma(c,120),1) and ma(c,250)>ref(ma(c,250),1);

a1:=c>ref(c,1) and ref(c,1) >ref(c,2)  and v>ref(v,1)  and ref(v,1) >ref(v,2) ;
a2:=ma(c,60)>ref(ma(c,60),1) and ma(c,120)>ref(ma(c,120),1) and ma(c,250)>ref(ma(c,250),1);
a3:=a1 and a2;
选股1: count(a3,10)=1 and a3;



B:=VOL/MA(V,5);
选股2:B>2.5 AND  V/CAPITAL*100>4.5 ;



选股3:cross(c,ma(c,20)) and  ma(c,60)>ref(ma(c,60),1) and ma(c,120)>ref(ma(c,120),1) and ma(c,250)>ref(ma(c,250),1);

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答案：D

解析：

参考答案：A