—Goodevening.Grandma’sRestaurant.MayIhelpyou?<br/>—Goodevening.<spanstyle="text-decoration:underline;"></span><spanstyle="text-decoration:underline;">1</span><spanstyle="text-decoration:underline;"></span><br/>—Thankyou.MayIhaveyourname,Miss?<br/>—MaryBrown.<br/>—<spanstyle="text-decoration:underline;"></span><spanstyle="text-decoration:underline;">2</span><spanstyle="text-decoration:underline;"></span><br/>—I’dliketoorderthe“FreeMatchingDinnerfor2”.<br/>—Yes,youmaychoosetwosoups,twodrinksandfourmaincoursefromthemenu.<br/>—<spanstyle="text-decoration:underline;"></span><spanstyle="text-decoration:underline;">3</span><spanstyle="text-decoration:underline;"></span><br/>—areyouready.WhatKindofsoupdoyouwant?<br/>—Chickensoupandtomatosoup.<br/>—<spanstyle="text-decoration:underline;"></span><spanstyle="text-decoration:underline;">4</span><spanstyle="text-decoration:underline;"></span><br/>—I’dlikeaplateofnoodles,twochickenwings,somebeefandabowlofrice.<br/>—<spanstyle="text-decoration:underline;"></span><spanstyle="text-decoration:underline;">5</span><spanstyle="text-decoration:underline;"></span><br/>—MayIcokeandsomegreentea,please.<br/>—MayIhaveyouraddress,please?<br/>—Sure,6A,kingstonCourt,BelairCardens,Shatin.<br/>—Okay,letmesee.<br/>A．MayIbookatableinyourrestaurantfortonight?<br/>B．Iwouldliketoordersomefoodfordinner.<br/>C．MissBrown,pleasetellmeyourorder.<br/>D．Howaboutyourmaincourses?<br/>E．Wouldyoulikesomedrinks?<br/>F．Okay.Letmesee.<br/>G．Andyourdrinks?

比较C≡C, C=C, C─C, C=C─C=C的键长次序为: C=C─C=C>C─C> C≡C >C=C|C=C─C=C>C─C>C=C>C≡C|C≡C>C=C>C─C>C=C─C=C|C─C>C=C>C=C─C=C>C≡C|C─C>C=C─C=C>C=C>C≡C

下列哪种主链骨架原子排列最能代表两个肽键?() A: Cα—N—Cα—C—Cα—N—Cα—C B: Cα—N—C—C—N—Cα C: C—N—Cα—Cα—C—N D: Cα—C—N—Cα—C—N E: Cα—Cα—C—N—Cα—Cα—C

比较C≡C(Ⅰ),C=C(Ⅱ),C─C(Ⅲ),C=C─C=C(Ⅳ)的键长次序为( )。 A: Ⅰ＞Ⅱ＞Ⅲ＞Ⅳ B: Ⅲ＞Ⅱ＞Ⅳ＞Ⅰ C: Ⅲ＞Ⅳ＞Ⅱ＞Ⅰ D: Ⅳ＞Ⅲ＞Ⅱ＞Ⅰ

不稳定的一类化合物是: C≡C|C－C|C＝C|C＝C－C＝C|C＝C＝C

NaNH4HPO4水溶液的质子条件式为 A: c(H+)+c(H2PO4-)+2 c(H3PO4)=c(OH-)+c(NH3) +c(PO43-) B: c(H+)+c(H2PO4-)+ c(H3PO4)=c(OH-)+c(NH3) +c(PO43-) C: c(H+)+c(NH3)+ c(H3PO4)=c(OH-)+c(PO43-) +c(H2PO4-) D: c(H+)+c(NH3)+ 2c(H3PO4)=c(OH-)+c(PO43-) +c(H2PO4-)

比较C≡C(I)，C=C(II)，C─C(III)，C=C─C=C(IV)的键长次序为：

在同一种固体介质中，纵波、横波、表面波三者之间的声速关系为（） A: C﹤C﹤C B: C﹤C﹤C C: C﹤C﹤C D: C﹤C﹤C

scanf(“%c%c%c“, &a,&b,&c)与scanf(“%c %c %c“ ,&a,&b,&c)的输入（ ）。

能产生共轭效应的是 A: C=C=C B: C=C C: C≡C D: C=C-C=C E: C-C