如何制作简易火箭？. ……

else – and give it a sharp squeeze (挤压).  What happened?What happened?The large straw... straw• Thin plastic straw that fits     easily inside large one• Styrofoam ……

straw or a hollow plastic coffee-stirring stickScissorsDo this experiment on a kitchen or bathroom... the other cup next to it, sitting on the woodCut the big straw in half, put one end in the water ……

straw or a hollow plastic coffee-stirring stickScissorDo this experiment on a kitchen or bathroom... the other cup next to it, sitting on the woodCut the big straw in half, put one end in the water and lean ……

. take up  3. What do we know from the passage?3. What do we know from the passage ……

小信封里的长吸管What you need:A straw (吸管，最好准备有条纹的吸管)An envelopeScissorsHow to play:1.Show people the small envelope.2.Take the straw from inside the envelope.Put the straw next to (紧挨着) the envelope. Let ……

剪不断的线What you need:A straw (吸管)String (线)ScissorsKnifeBefore the show:Make a 5-6cm cut (切口) in the middle of the straw.How to play:1.Put the string through the straw.2.Fold (折叠) the straw in half. 悄悄 ……

难度：较易What you need:A thick(1) strawThree thin strawsThread (线) Tape (胶带) Card head Scissors1Make... straw.4Stick(3) card head to the third thin straw.5Fix(4) the straw with head in the thick straw ……

剪不断的线难度：较易What you need:A straw (吸管)String (线)ScissorsKnifeBefore the show:Make a 5-6cm cut (切口) in the middle of the straw.1. Put the string through (穿过) the straw.2. Fold(1) the straw in half. (悄悄 ……

needYou’ll need• Thin plastic straw• Fresh leaf with long stem (茎)• Clear bottle• Modeling clay (可以塑形的泥土)• Bathroom mirror• Thin plastic straw• Fresh leaf ……

stops rising in straw, check temperature of water with thermometer and mark that on straw.What... coloring.2. Put clay 2 in. (5 cm) from end of straw and push onto bottle; don’t let ……

for your mom on Mother's Day. What you need:A craft knife (手工刀) A flexible straw (自由... a straw through (穿过去) the two flowers. 4. Use scissors to cut the top5 of the straw into strips (条 ……

简单易做的百合花What you need:A straw (吸管)White paper Green paper Yellow paperPencilGlue (胶水)How to make:1... the straw through the leaves. Wrap (包) the hand around the top of a straw and glue (粘) it. ……

.Straw is above water.Stem is under water.Straw is above water.What happened?What happened?A leaf has... (吮吸) steadily on straw.3. Stand in front of mirror with bottle and suck (吮吸) steadily on straw.4 ……

。What does UNESCO stand for?stand for 代表，象征用法：stand for freedom 代表和平。由 stand 构成的其它短语：stand up 起立，站起来；stand by 袖手旁观，支持。What does UNESCO stand for?carry   v. 携带，拿着，扛着用法：carry 不表明来去的方向性。区别：bring v ……