【简答题】A: I haven't done my homework _______. B: Really? But you've had it since last Tuesday!
【单选题】对于反应 2NO 2 → 2NO + O 2 ,当选用不同的反应物和产物来表示反应速率时,其相互关系为
A.
-2d[NO 2 ]/d t = 2d[NO]/d t = d[O 2 ]/d t
B.
- d[NO 2 ]/2d t = d[NO]/2d t = d[O 2 ]/d t = d x /d t
C.
- d[NO 2 ]/d t = d[NO]/d t = d[O 2 ]/d t
D.
- d[NO 2 ]/2d t = d[NO]/2d t = d[O 2 ]/d t = 1/ V d x /d t
【多选题】以下对数据节点理解正确的是
C.
数据节点在名称节点的统一调度下进行数据块的创建、删除和复制等操作
【单选题】I haven't really had time to ______ everything that she said.
【单选题】某企业投资性房地产采用成本计量模式。2017年1月25日购入一幢建筑物用于出租,该建筑物的成本为270万元,预计使用年限为20年,预计净残值为30万元,采用直线法计提折旧。2017年应该计提的折旧额为( )万元。
【多选题】以下对数据节点理解正确的是
B.
数据节点在名称节点的统一调度下进行数据块的创建、删除和复制等操作
【单选题】某企业投资性房地产采用成本计量模式。2007年1月1日购入一幢建筑物用于出租。该建筑物的成本为270万元,预计使用年限为20年,预计净残值为30万元。采用直线法计提折旧。2007年应该计提的折旧额为( )万元。
【单选题】听力原文:W: Hey, Dave! I haven't seen you for ages. How have you been? M: Oh, I'm doing okay, but school has been really busy these days, and I haven't had time to relax. W: By the way, what's your major ...
A.
He wants to become a cook.
B.
He hopes to go on to graduate school.
C.
He wants to travel around the world.
D.
He'd like to work at a hotel.
【单选题】由下列短周期元素性质的数据推断元素3最高价氧化物对应的水化物碱性最强 B.表示H2燃烧热的化学方程式为:2H2(g)+O2(g)=2H2O(1)△H=—571.6kJ/mol C.图甲表示Zn-Cu(稀硫酸)原电池反应过程中的电流强度的变化,T时可能加入了H2O2 D.图乙表示某一放热反应,若使用催化剂E1、E2、△H都会发生改变
【简答题】Rewrite the following sentences so that they are positive rather than negative. 1. You failed to give us the fabric specifications of the sofa you ordered . 2. I cannot accept the recommendation of th...