Nobody but Jane ______ the secret. A: know B: B．knows C: have known D: D．is known

He paints the wall _____. A: A.white B: B.to white C: C.be white D: D.is white

7. —What are you doing over there, dad? — I______ . A: A．read B: B．reads C: C．am reading D: D．is reading

My elder brother（）as a lawyer. A: A.puts into practice B: B.keeps himself in practice C: C.is out of practice D: D.is in practice

The old over 90 _______ not only by their family but also by the government in many places． A: A．is looked at B: B．are taken good care of C: C．are taken good care D: D．is looking after

如果ξ与η不相关，则（）。 A: D（ξ+η）=Dξ+Dη B: D（ξ-η）=Dξ-Dη C: D（ξη）=Dξ·Dη D: E（ξη）=Dξ·Dη

已有定义intd=-2;，执行以下语句后的输出结果是：printf('*d(1)=%d*d(2)=%3d*d(3)=%-3d* ',d,d,d,d);printf('*d(4)=%o*d(5)=%7o*d(6)=%-7o* ',d,d,d,d);printf('*d(4)=%x*d(5)=%6x*d(6)=%-6x* ',d,d,d,d);

圆柱螺旋弹簧的旋绕比C是（） A: d/D B: d/D C: D/d D: D/d

已有定义int d= –2；执行以下语句后的输出结果是。 printf(" * d(1) =%d * d(2)= %3d * d(3) =% –3d * "，d，d，d)； printf(" * d(4) =%d * d(5)= %7d * d(6) =% –7d * "，d，d，d)；

若有说明语句：int a，b，c，* d＝＆c；，则能正确从键盘读入三个整数分别赋给变量a、b、d的语句是 ( ) A．scanf("%d%d%d"，＆a，＆b，d)； B．scanf("%d%d%d"，＆a，＆b，＆d)； C．scanf("%d %d%d"，a，b，d)； D．scanf("%d%d%d"，a，b，* d)；