小学英语四年级下册连词成句
1.is where the office teachers’ (?)
2.is it on first the floor ( .)
3.teachers’ office the next is to library the (.)
4.that is computer the room (?)
5.you do a have library (?)
6.it is what time （？）
7.it is dinner time for (.)
8.time go home to (.)
9.I can go now outside (?)
10.i t cold is outside(.)
11.w eather what is the like Beijing in (?)
12.i t rainy is (.)
13.i t is cold (?)
14.c arrots these are (?)
15.a re these what (?)
16.a re they tomatoes (.)
17.h ens they are (?)
18.y ours they are (?)
19.C hen Jie’s they are (.)
20.t his is John’s (?)
21.t his is whose coat (?)
22.a re whose pants those (?)
26.your father’s they are (.)
23.c an help I you (?)
24.t hese shoes nice are (.
25.I that green like skirt (.)
26.I try them on can (?)
27.t oo they small are (.)
28.d o like how you skirt this (?)
29.is it pretty very.
30.i s skirt how this much (?)
31.s ize let’s 7 try (.)
32.n ew where are socks my (?)
33.p ut your shirt on (.)
34.h orses how do you many have (?)
35.i t sunny hot and in is Sydney (.)
36.B eijing about how (?)
37.b reakfast ready is (.)
38.g o to us the playground let (.)
39.s tudents many are in class your there how (?
40.w elcome our to school (.)
41.i s here homework my (.)
42.t his weather is report (.)
《等边三角形》练习题
1．（2012•深圳）如图，已知：∠MON=30°，点A1、A2、A3…在射线ON上，点B1、B2、B3…在射线OM上，△A1B1A2、△A2B2A3、△A3B3A4…均为等边三角形，若OA1=1，则△A6B6A7的边长为（）
A．6B．12 C．32 D．64 2．（2012•凉山州）如图，一个等边三角形纸片，剪去一个角后得到一个四边形，则图中∠α+∠β的度数是（）
A．180°B．220°C．240°D．300°3．（2012•荆门）如图，△ABC是等边三角形，P是∠ABC的平分线BD上一点，PE⊥AB 于点E，线段BP的垂直平分线交BC于点F，垂足为点Q．若BF=2，则PE的长为（）A．2B．2C．D．3
4．（2011•南平）边长为4的正三角形的高为（）
A．2B．4C．D．2
5．（2010•随州）如图，过边长为1的等边△ABC的边AB上一点P，作PE⊥AC于E，Q 为BC延长线上一点，当PA=CQ时，连PQ交AC边于D，则DE的长为（）A．B．C．D．不能确定
6．（2009•攀枝花）如图所示，在等边△ABC中，点D、E分别在边BC、AB上，且BD=AE，AD与CE交于点F，则∠DFC的度数为（）
A．60°B．45°C．40°D．30°7．（2007•绵阳）如图，在正方形ABCD的外侧，作等边△ADE，BE、CE分别交AD于G、
A．3S1=2S2B．2S1=3S2C．2S1=S2D．S1=2S2
A．4cm2B．2cm2C．3cm2D．3cm2。