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看日全食工具的道理用电焊护目镜看 电焊护目镜本就是在强光下保护眼睛的,用它直接看太阳就可以. 2 用废胶片看 把新买的胶片扯出来,让它完全曝光.两片以上的废胶片叠在一起就可以用 listed non-financial A-share firm 物理热学选择题1、冬天写字时常常感到手冷,为了使手暖和一些,有的同学用嘴对着手呵气,有的同学则两手来回搓动,试说明这样做的道理．2下列说法正确的是（ ）A.物体吸收热量,没有对外做 ( )( )after five minutes. wire和cable和circuit有什么区别?尤其是涉及电子部件的,中文电缆,电线或者XXX线,不知道用哪个翻译 跑步后我有点累.i'm () () tired after running. 跑步以后我有点累改为l am ( )( )tired after running It will ___ us several years to learn a foreign language well.A cost B take C spend D use It will___us many years to learn English well.A.spendB.useC.takeD.ride急 Lee __________ (learn) English for several years,and at last he _________ (master) the irregular verbs. My mother often feels tired after —— .(walk) jim feels tired after piaying football是什么意思 wire extrusion 求4/3π的正弦、余弦和正切值 2/5的分母和分子都加上相同的数,得到的分数值是20/21.问加的自然数是（ 五分之二的分子、分母加上同样的自然数,分数值是二十一分之二十.加的自然数是多少? 哪位大侠帮翻译下这句话.Pls check and advise if received our samples? thanks for advise.i got it!and i think i will fnd the way soon! 世界围地最大的城墙 介绍一下“流氓软件教父”周鸿袆 周鸿袆的第三个字读什么? 角5/6π的正弦值,余弦,正切的值 求5/4π的正弦值 余弦值 正切值 求详解 求5∏/3的正弦.余弦.正切值线段的终边与圆的交点坐标如何求和三角函数 袆广州音如何读 祎和袆念什么,急. Noted and will help to cancel another two mentioned report,thanks for your reply谁能帮我译出中文? has lan sold his house yet为什么要加yet如果我不加yet~直接has lan sold his house 可以吗会有什么不一样的呢 has lan sold his house yet ?他已经卖了房子了吗?1,sold是过去式还是过去分词?怎么知道它是过去式还是过去分词?2,此句是什么时态?怎么知道它是什么时态?以上请按2个问题回答,尽量通俗易懂,非常 why do we wear uniforms初二英语作文..50字以上吧...急..本人新号一个,没多少分可以给大家.. Has Ian sold his house yet?中的 yet用法Has Ian sold his house yet?Has Ian sold his house?Has he moved to his new house yet?Has he moved to his new house?He hasn't moved to his new house yet.He hasn't moved to his new house.上面的句子不加ye we wear colorful paper hats.