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【单选题】
在数字系统里，当某一线路作为总线使用，那么接到该总线的所有输出设备（或器件）必须具有 结构，否则会产生数据冲突。A.
灌电流
B.
拉电流
C.
集电极开路
D.
三态门
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皮皮学刷刷变学霸
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【单选题】出口退税是指国家为帮助出口企业降低成本,增强出口产品在国际市场上的竞争力,鼓励(),而实行的由国内税务机关退还出口商品国内税的措施。
A.
出口创汇
B.
出口
C.
廉价出口
D.
出口创收
【单选题】What is the main idea of the passage?
A.
What should be done to help those affected by autism.
B.
A genetic base should be found to study the cause of autism.
C.
Some truths about autism.
D.
What is autism and what we have known about autism.
【单选题】What should be done to help parents to understand and further the objectives of the school?
A.
The teacher should keep in touch with parents.
B.
The teacher should tell parents their children's shortcomings.
C.
The teacher should make a curricula objectives for parents.
D.
The teacher should make good friends with parents.
【单选题】关于肾髓质组织间液高渗状态的形成 , 错误的是 :
A.
与髓绊 、 集合管对不同物质的选择性吸收有关
B.
外髓高渗的形成依赖于升支粗段对 Na + 、 Cl - 的主动重吸收
C.
内髓高渗的形成有赖于升支细段对 Na + 和 Cl - 的主动重吸收及集合管对 NH 3 的被动重吸收
D.
内髓高渗的形成依赖于升支细段对 Na + 、 Cl - 的被动重吸收和集合管对尿素的被动重吸收
【单选题】I’m pleased ______ should be done has already been done.
A.
with what
B.
that that
C.
by that
D.
that what
【简答题】定义菜单项时,为了使该菜单项呈灰色,应将其 Enable 属性设置为( )。
【单选题】What should be done to catch up the popularity of alternative medicine?
A.
Doctors need to be fully educated about alternative medicine.
B.
Alternative therapy deserves more research to get scientific data.
C.
Patients need to be guided to what is beneficial and helpful.
D.
Each of the above mentioned is part of what should be done.
【单选题】( ) 是指国家为帮助出口企业降低成本,增强出口产品在国际市场上的竞争能力,鼓励出口收汇而实行的由国内税务机关退还出口商品国内税的措施。
A.
出口退税
B.
出口收汇核销
C.
出口报关
D.
出口结汇
【简答题】What should be done in order to keep the advertising costs down and manageable?
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