手枪电钻常用的6mm、13mm等几种规格，电源一般用（）V。 A.380 B.24 发布时间：2017-05-27 16:30 │ 来源：www.tikuol.com 题型：单项选择题 问题： 手枪电钻常用的6mm、13mm等几种规格，电源一般用（）V。 A.380B.24C.220D.12
题型：单项选择题 配对阅读。左栏的5个人想征友，右栏是7位应征人的简介。请将相关信息配对。 ( )1. Alan, a 22-year-old boy, wants to have a femalepen pal who is from Asia, because he is interested in Asian countries and their history. ( )2. Sandy is a Chinese girl. She likes music, traveling and playing sports. She wants a pen pal fromAmerica. ( )3. Mary is from Brazil. She wants to write to her pen pal because she doesn't havea computer. ( )4. Jennifer is16. She wants to have a pen pal whois the same age as her.( )5. Sam loves talking with his friends on theInternet. He thinks it's slow to write e-mails.A. Roy, the USA I love sports, music and traveling. I want to meet people from Asian countries. B. Bonnie, England I'd like to make friends with those who come from all over the world. I love music, sports and movies. C. Mario, Egypt Hi! I want to have a lot of friends from all over the world.I prefer to write letters to my friends. D. Shirley, Japan Hi! I'm a university student, a 21-year-old girl. I like to make friends. I'd like to talk about my country, the cultureand so on.E. Peter, Korea I'm a 15-year-old boy. I like playing computer games, listening to music and seeing movies. I like to talk with myfriends on the Internet.F. Sam, France Hi! I'm 16. I'd like to make friends with those who are as old as me. I like listening to R&B and hip-hop music. G. John, Italy I like traveling and meeting new friends. I'm a bit shy, but I can get along well with people. 查看答案
题型：单项选择题 设NA代表阿伏加德罗常数。下列说法正确的是A．标准状况下，2.24 L NH3溶于l L水中得到0.1 mol/L的氨水B．1mol 苯分子中含有碳碳双键数约为3×6.02×1023C．0.4 mol乙炔和乙醛混合气体，在氧气中充分燃烧,消耗氧气的分子数为NAD．500 mL 0.2 mol/L的K2S溶液中含有的离子总数为0.3 NA 查看答案