皮皮学，免费搜题
登录
搜题
【单选题】
以下对新能源DC-DC的功能描述正确的是( )A.
纯电模式下，DC的功能替代了传统燃油车挂接在发动机上的12V发电机，和蓄电池并联给各用电器提供低压电源。
B.
将电池包的直流电转换为交流电给驱动电机供电。
C.
监测电池包状态。
D.
将电动机回馈的交流电转换为直流电。
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】Boeing Inc. has criticized The Airbus Company's competitiveness on the grounds that Airbus benefits from:
A.
Import tariffs protecting Airbus in the European market
B.
Import quotas protecting Airbus in the European market
C.
Lenient environmental standards of European governments
D.
Production subsidies supplied by European governments
【单选题】--Shopping with me, Tina? --Sorry, I have much homework _____. [ ]
A.
to do
B.
did
C.
do
D.
doing
【单选题】According to the passage, Airbus and Boeing shared the following challenges EXCEPT______.
A.
financial trouble of potential customers
B.
labour dispute with their employees
C.
risk of oil price higher than $100
D.
difficulties in developing new aircraft
【单选题】—Hello!May I speak to Tina, please? — Sorry, I'm afraid you have the wrong __________. [ ]
A.
name
B.
way
C.
number
D.
telephone
【单选题】Boeing executives found the announcement of Airbus 'provocative' because______.
A.
Airbus received higher subsidies than Boeing
B.
Airbus received new subsidies while the old dispute remained unsolved
C.
Airbus didn't have to repay the newly announced subsidies
D.
WTO ruling is expected to be in Airbus's favour
【多选题】内部收益率作为评价投资方案经济效果的指标，其特点包括( )。
A.
能够直接衡量项目未回收投资的收益率
B.
需要大量与投资项目有关的数据
C.
需要事先确定一个基准收益率
D.
考虑了资金的时间价值
E.
能够反映项目单位投资的盈利能力
【判断题】ACN 数和飞机的总质量只有间接关系, 当 ACN 值小 于 PCN 值, 飞机 不 可以 无限制 使用该跑道 , 在一些特殊情况下, ACN 值可以在大于 PCN 值 5%-10% 以下时使用这条跑道,这样不会带来跑道使用寿命的缩短 。
A.
正确
B.
错误
相关题目：
参考解析：
知识点：
题目纠错 0
发布
