山中小雨的诗词

H2 和D2是同素异形体吗 请问,H2和D2是同素异形体吗?为什么? 为什么H2和D2不是同素异形体?请老师, Please put the desk b_____ the sofa and dresser. There are two small bookcase ,a desk ,a chair and a bed.这个句子成不成立There are two small bookcases,a desk ,a chair and a bed in my bedroom.只要回答成不成立就行 chair desk bookcase computer哪一个不是同类 How do you like our school?I think it' gettingA.more and more nicerB.more nice and more niceC.nicer and nicerD.the nicer,the nicer 是I don't think he looks like还是I don't think he look like?.是I don't think he looks like还是I don't think he look like?是He don't think I looks like还是He doesn't think I look like?请同时将有关于don't think的语法点说一下, Look,do you think that man look like someone in our school?No ,he looks like ____,it could be ____else.A someone;nobodyB no one;anybodyC everyone;somebodyD anyone;somebody How do you like our English?Do you think it's helpful to you?why or why not?一两分钟的口试 I like my room改一般疑问句 K和CL变成离子K+CL-的时候,他们的电子数,质子数,中子数,质量数哪个一样 y=2-(根号下-x²+6x) x∈[0,4],求这个函数的值域,急RT,能用换元法吗,我令根号下-x²+6x=t,则-x²+6x=t²y=-t²+2,做到这里对吗?,接下去怎么求值域,他告诉我x∈[0,4]但我求的是y与t的关系式, His friends like piaying basketball.（一般疑问句,肯定和否定回答） 关于感恩的征文怎么写以感恩为话题的征文,文体不限,字数约1500, 怎样写感恩社会征文 918/918又919分之918怎样简便计算,快快要简算的,过程写上哦 we have a soccer game in our school（改为一般疑问句（）（）do you have in your school） we have a school dy at our school（变一般疑问句,并作肯定回答） 918/18用简便计算怎么做 cl的原子序数为17,质量数为35的cl是cl的一种同位数,下列说法正确的是：为什么BD是对的,怎么算?求BCD的解题思路 用a tv chair picture造句 解方程组4分之x+y+5分之x-y=3,4分之x+y-5分之x-y=-1 teacher watch chair造句 the,is,the,baseball,on,chair怎么造句 一条数学题：设f(x)=ax-2,A={x/f(x)=x}={a},求a的值 整式乘法与因式分解关系的论文整式乘法与因式分解关系的数学论文 因式分解与整式乘法的关系 手表里的sec是什么意思 设a>0 当x 属于【-1,1】时 函数f(x)=-x^2-ax+b 有最小值-1 最大值1求使函数取得最大值和最小值是相应的x的值 化学反应速率与活化能的测定那个实验方程的反应级数是多少? sec是什么