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【单选题】
关于消化管运动作用的描述,下列哪错误的( )
A.
磨碎食物
B.
使食物与消化液充分混合
C.
使大分子物质分解成小分子物质
D.
向消化管远端推送食物
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【单选题】卫星通信是利用人造地球卫星作为中继站转发无线信-号，在两个或多个地球站之间进行的通信，其通信业务包括电报、电话、电视、数据传输及综合业务数字网等。 卫星最大的通信距离是( )km。
A.
40000
B.
20000
C.
18000
D.
12000
查看完整题目与答案
【单选题】在程控交换机中,下列执行级别最低的程序是( )
A.
基本级
B.
故障级
C.
周期级
D.
时钟级
查看完整题目与答案
【单选题】Under rent control, tenants can expect
A.
lower rent and higher quality housing.
B.
lower rent and lower quality housing.
C.
higher rent and a shortage of rental housing.
D.
higher rent and a surplus of rental housing.
查看完整题目与答案
【单选题】电信包括无线电、电报、电话、电视、数据通讯以及互联网（）等不同种类的通讯方式。
A.
产品
B.
即时通讯
C.
平台
D.
互动
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【单选题】Under rent control, landlords cease to be responsive to tenants' concerns about the quality of the housing because
A.
with rent control, the government guarantees landlords a minimum level of profit.
B.
they become resigned to the fact that many of their apartments are going to be vacant at any given time.
C.
with shortages and waiting lists, they have no incentive to maintain and improve their property.
D.
with rent control, it becomes the government's responsibility to maintain rental housing.
查看完整题目与答案
【单选题】According to the critics, rent control .
A.
will always benefit those who rent apartments
B.
is unnecessary
C.
will bring negative effects in the long run
D.
is necessary under all circumstances
查看完整题目与答案
【多选题】装配工作必须按一定的程序进行。装配程序一般应遵循如下原则:( )
A.
先装下部零件，后装上部零件。
B.
先装内部零件，后装外部零件。
C.
先装笨重零件，后装轻巧零件。
D.
先装精度要求较高的零件，后装一般性零件。
查看完整题目与答案
【单选题】卫星通信是利用人造地球卫星作为中继站转发无线信-号，在两个或多个地球站之间进行的通信，其通信业务包括电报、电话、电视、数据传输及综合业务数字网等。 (1)卫星最大的通信距离是( )km。
A.
40000
B.
20000
C.
18000
D.
12000
查看完整题目与答案
【单选题】装配工作必须按一定的程序进行,一般遵循( )
A.
先内部零件,后外部零件
B.
先外部零件,后内部零件
C.
先一般的零件,后精度高的零件。
D.
先轻巧零件,后笨重零件
查看完整题目与答案
【单选题】Under rent control, landlords cease to be responsive to tenants’ concerns about the quality of the housing because
A.
with shortages and waiting lists, they have no incentive to maintain and improve their property.
B.
they know they can never please their tenants.
C.
the law no longer requires them to maintain their buildings.
D.
it becomes the government’s responsibility.
查看完整题目与答案
相关题目：
【单选题】卫星通信是利用人造地球卫星作为中继站转发无线信-号，在两个或多个地球站之间进行的通信，其通信业务包括电报、电话、电视、数据传输及综合业务数字网等。 卫星最大的通信距离是( )km。
A.
40000
B.
20000
C.
18000
D.
12000
查看完整题目与答案
【单选题】在程控交换机中,下列执行级别最低的程序是( )
A.
基本级
B.
故障级
C.
周期级
D.
时钟级
查看完整题目与答案
【单选题】Under rent control, tenants can expect
A.
lower rent and higher quality housing.
B.
lower rent and lower quality housing.
C.
higher rent and a shortage of rental housing.
D.
higher rent and a surplus of rental housing.
查看完整题目与答案
【单选题】电信包括无线电、电报、电话、电视、数据通讯以及互联网（）等不同种类的通讯方式。
A.
产品
B.
即时通讯
C.
平台
D.
互动
查看完整题目与答案
【单选题】Under rent control, landlords cease to be responsive to tenants' concerns about the quality of the housing because
A.
with rent control, the government guarantees landlords a minimum level of profit.
B.
they become resigned to the fact that many of their apartments are going to be vacant at any given time.
C.
with shortages and waiting lists, they have no incentive to maintain and improve their property.
D.
with rent control, it becomes the government's responsibility to maintain rental housing.
查看完整题目与答案
【单选题】According to the critics, rent control .
A.
will always benefit those who rent apartments
B.
is unnecessary
C.
will bring negative effects in the long run
D.
is necessary under all circumstances
查看完整题目与答案
【多选题】装配工作必须按一定的程序进行。装配程序一般应遵循如下原则:( )
A.
先装下部零件，后装上部零件。
B.
先装内部零件，后装外部零件。
C.
先装笨重零件，后装轻巧零件。
D.
先装精度要求较高的零件，后装一般性零件。
查看完整题目与答案
【单选题】卫星通信是利用人造地球卫星作为中继站转发无线信-号，在两个或多个地球站之间进行的通信，其通信业务包括电报、电话、电视、数据传输及综合业务数字网等。 (1)卫星最大的通信距离是( )km。
A.
40000
B.
20000
C.
18000
D.
12000
查看完整题目与答案
【单选题】装配工作必须按一定的程序进行,一般遵循( )
A.
先内部零件,后外部零件
B.
先外部零件,后内部零件
C.
先一般的零件,后精度高的零件。
D.
先轻巧零件,后笨重零件
查看完整题目与答案
【单选题】Under rent control, landlords cease to be responsive to tenants’ concerns about the quality of the housing because
A.
with shortages and waiting lists, they have no incentive to maintain and improve their property.
B.
they know they can never please their tenants.
C.
the law no longer requires them to maintain their buildings.
D.
it becomes the government’s responsibility.
查看完整题目与答案