PS(poly styrene)是()A、聚乙烯B、聚丙烯C、聚丁烯D、聚夯乙烯

PS(poly styrene)是()

  • A、聚乙烯
  • B、聚丙烯
  • C、聚丁烯
  • D、聚夯乙烯

相关考题:

有以下程序 main( ) { char str[ ]="xyz",*ps=str; while(*ps) ps++; for(ps--;ps-str>=0;ps--) puts(ps);} 执行后输出结果是A.yz xyzB.z yzC.z yz xyzD.x xy xyz

大部分真核生物的mRNA的3'端具有的结构是A.Poly AB.Poly TC.Poly UD.Poly GE.Poly C

PEB (聚-β-羟丁酸poly- B -hydroxybutyrate) (名词解释)

The Abbreviation of Acrylonitrile Butadiene Styrene is ABS。() 此题为判断题(对,错)。

下列设置图像地图正确的HTML代码是__(43)__。A.<area shape=“poly”href=“image.html” cords=“100,100,180,80,200,140”>B.<area shape=“100,100,180,80,200,140”href=“image.htmlcoords=“poly”>C.<areashape=“image.html”href=“poly”cords=“100,100,180,80,200,140”>D.<areashape=“poly”href=“100,100,180,80,200,140”cords=“image.html”>

有以下程序: main() { char str[]="xyz", *ps=str; while(*ps) ps++; for(ps--;ps-str>=O;ps--) puts(ps); } 执行后的输出结果是( )。A.yz xyzB.z yzC.z yz xyzD.x xy xyz

真核生物mRNA的3′-末端"尾巴"结构是( )A、约200个核苷酸的poly(C)B、约200个核苷酸的poly(A)C、约100个核苷酸的poly(G)D、约200个核苷酸的poly(U)E、约300个核苷酸的poly(U)

You are to load styrene in bulk,which is subject to self-polymerization.You must ______.A.Not carry any cargo in the tanks surrounding the tank loaded with styreneB.Inject nitrogen to pad any ullage above the styrene to prevent contact with oxygenC.Be furnished with a Certificate of Inhibition to be maintained on the bridgeD.Use heating coils to maintain the styrene within the temperatures specified by the shipper

Your tanker is carrying a cargo of styrene.Which of the following is NOT a requirement for carriage of this cargo ________.A.P/V valves with galvanized parts must be replacedB.Authorization to carry styrene must be endorsed on the Certificate of InspectionC.You must have a Certificate of Inhibition provided by the shipperD.The cargo tank heating coils must be blanked off

光纤色散系数的单位是()A、ps/(nm.km)B、ps/kmC、ps/nmD、ps

poly(A)加尾信号

查看系统当中所有进程的命令是()。A、ps allB、ps aixC、ps aufD、ps aux

第一链合成所需的引物是()A、Poly AB、Poly CC、Poly GD、Poly T

转录过程关键的酶是()。A、DNA poly IB、DNA poly IIC、引发酶 primaseD、RNA 聚合

偏振模色散系数单位是()。A、ps/nm.kmB、ps/umC、ps/nmD、ps/[(km)↑(1/2)]

真核生物mRNA合成后()。A、A、5’端有poly结构B、B、原先5’端无poly结构,加工后才形成这种结构

nurbs比poly的处理速度快。

下列哪种多聚氨基酸(poly-aa)在生理条件下易形成α-螺旋()。A、poly-ValB、poly-GluC、poly-LysD、poly-ProE、poly-Ala

对于10G速率业务单板的色散容限,NRZ编码的色散容限是(),ERZ编码的色散容限是()A、800ps/nm,400ps/nmB、1000ps/nm,500ps/nmC、400ps/nm,800ps/nmD、500ps/nm,1000ps/nm

PHB(聚-β-羟丁酸poly-β-hydroxybutyrate)

单选题以下使指针指向一个字符串的选项错误的是(  )。Achar str[]=string; char * ps; *ps= str;Bchar str[]=string; char *ps; ps= str;Cchar str[]=strinh,* ps=str;Dchar * ps; ps=str; ps=strinh;

单选题转录过程关键的酶是()。ADNA poly IBDNA poly IIC引发酶 primaseDRNA 聚合

单选题真核生物mRNA的3′-末端尾巴结构是()A约200个核苷酸的polyC.BB.约200个核苷酸的polyC约100个核苷酸的poly(G)D约200个核苷酸的poly(U)E约300个核苷酸的poly(U)

名词解释题聚—β—羟丁酸(poly—β hydroxybutyrate,PHB)

单选题一般地,在同一个制程中,下列集成电容,单位面积电容最小的是()AMetal1-to-Metal2BMetal1-to-Poly2CPoly1-to-bulkDPoly2-to-Poly1

单选题对于10G速率业务单板的色散容限,NRZ编码的色散容限是(),ERZ编码的色散容限是()A800ps/nm,400ps/nmB1000ps/nm,500ps/nmC400ps/nm,800ps/nmD500ps/nm,1000ps/nm

问答题简述沉积多晶硅采用什么CVD工具?掺杂的Poly-Si的主要用途。写出掺杂的Poly-Si做栅电极的6个原因。