【简答题】如图,把一个平行四边形分成四个部分,已知平行四边形的面积是24平方厘米,三角形a的面积占平行四边形的 1 3 ,则三角形b的面积是______平方厘米.
【单选题】一个由木条钉成的平行四边形的面积是40平方分米,把它变成一个长方形后面积和平行四边形比( )
【单选题】You don’t have to describe her I herseveral times .
【单选题】一个平行四边形与一个三角形的面积相等,但三角形的底边的长度正好是平行四边形的2倍,这个平行四边形的高与三角形的高是什么关系.( )
【单选题】听力原文: U.N. Security Council envoys pushing for an end to the Democratic Republic of Congo's almost three-year-old war are praising Congolese President Joseph Kabila for taking steps to resolve the con...
A.
U.N. Secretary Council Envoys.
B.
President Joseph Kabila.
D.
President Jose Eduardo Dos Santo.
【单选题】创业的成败可能受多种因素的影响,其中最关键的因素是( )。
【单选题】对于克劳修斯不等式 dS ≥ δQr / T环 ,下列判断不正确的是
A.
dS = δQr / T环 时必为可逆过程或处于平衡状态
B.
dS > δQr / T环 时必为不可逆过程
D.
dS < δQr / T环 时不可能自动发生的过程
【单选题】听力原文:The U.N. agency says a shortage of roads, rail networks, ports and energy projects in rapidly- growing Asia threatens to hold back the region's economies. At a two-day meeting in New Delhi, the U...
A.
Economies of Asia and Pacific region will remain rapidly-growing in spite of the shortage of infrastructure.
B.
The infrastructure deficit in Asia is highlighted during a two-day meeting by representatives of 12 countries.
C.
A regional United Nations agency says Asia needs to step up investment in infrastructure to maintain the region's high growth momentum.
D.
The U.N. agency suggested Asia to invest in cross-border infrastructure projects.
【简答题】在氯水中发生下述反应:Cl2+H2O===H++Cl-+HClO。已知Eθ(Cl2/Cl-)=1.36 V,Eθ(HCl0/Cl2)=1.63 V,求当Cl2的分压为pθ时,氯水的pH。