完形填空 .从A、B、C、D四个选项中选出能填入空白处的最佳选项。
This is a family photo.Five1are in the photo,they are in a2.The boy is Barry Hand.3is a student.His school is in Puer.His parents are 4.Barry 5two sisters.One is Marry6the other is Mona.They are also students.Barry7math,and he likes sports.He8basketball every day.His sisters like9.It is a great language(语言). The Hand family has a phone. Its10is 773—1068.

2016央视春节联欢晚会是33年历史上第一次有民用无人机参与节目．如图所示是参与此次春晚的其中一架无人机，它的总质量是1280g，起飞前要先将其放在水平地面上，它与地面的接触面积为4cm²，飞行的最大高度为6000m，（g=10N/kg）下列说法正确的是（  ）

下列长度的各组线段中，能构成比例线段的是（　　）