皮皮学，免费搜题
登录
搜题
【单选题】
三,选择 1, It ______ three months _______ I last saw him. A was since B have been after C has been since D is for 2, Where _____ John? In the library. He _____ there for an hour. A has been, has gone B is has been C was went D had been went 3,My brother ______ the army for about two years. A has attended B has joined C has been in D has taken part in 4, _Have you finished your homework? _ Not _____. A ever B already C yet D just 5, I haven’t heard from him _____ last week. A Since B for C ago D before 6, He _______ his home for ten years. A has left B left from C has been away from D was away from 7, Jack _____ a letter to his parents last night. A write B write C wrote D has writtenA.
was since
B.
have been after
C.
has been since
D.
is for
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】虚拟现实在医疗上应用大致上分为两类，一类是虚拟人体，这样的人体模型医生更容易了解人体的构造和功能。另一是（ ），可用于指导手术的进行。
A.
自动手术
B.
康复系统
C.
虚拟手术系统
D.
虚拟诊断
【简答题】教育目的是一切教育工作的出发点和( )
【单选题】关于酚酞指示剂的配制方法,下列操作方法正确的是()
A.
称取酚酞0.2g，溶于100mL0.1moL/LNaOH溶液中
B.
称取酚酞0.2g，溶于100mL水中
C.
称取酚酞0.1g，溶于100mL水中，加入0.05moL/L氢氧化钠溶液5.7mL
D.
称取酚酞0.2g，溶于100mL90%（体积分数）乙醇溶液中
【多选题】教育目的是一切教育工作的出发点和归宿,是教育的根本性问题或核心问题,对一切教育工作都具有指导意义和作用,其表现为( )。
A.
导向作用
B.
激励作用
C.
评价作用
D.
强化作用
【简答题】滴定分析法包括 ( )、( ), ( ) 和 沉淀滴定 四种。滴定的主要方式有直接滴定法、 ( ) 和 间接滴定。
【简答题】滴定分析法的主要滴定方式包括()、()、()、() 。
相关题目：
参考解析：
知识点：
题目纠错 0
发布
