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【简答题】
完成资料里面上传的第二章第1节的作业
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举一反三
【单选题】Part A Directions: You will hear 10 short dialogues. For each dialogue, there is one question and four possible answers. Choose the correct answer ― A, B, C or D, and mark it in your test booklet. You...
A.
She prefers the artists she has studied.
B.
She hopes they will take some of the paintings away.
C.
She hasn't gone to see the exhibit yet.
D.
She doesn't want to describe the exhibit.
【单选题】在MCS-51单片机中,定时器T1有( )种工作模式。
A.
1
B.
2
C.
3
D.
4 【参考答案】在MCS-51单片机中，定时器T1只能工作在方式0、1、2，不能工作在方式3。因此定时器T1只有3种工作模式。
【简答题】当T0工作在方式3时,将T0分为两个独立的 位定时/计数器,此时T1的功能受到了限制,只能作为不需要中断功能的 发生器使用
【简答题】焦炉煤气从炭化室经上升管逸出时的温度为( )
【单选题】Talks and Conversations Directions: In this part of the test, you will hear several short talks and conversations. After each of these, you will hear a few questions. Listen carefully because you will...
A.
The effect of the atmosphere on rainfall.
B.
How conditions on Earth support life.
C.
How water originated on Earth.
D.
A new estimate of the age of Earth.
【单选题】Socket类允许使用( )枚举中所列出的任何一种协议执行异步和同步数据传输。
A.
ProtocolType
B.
Protocol
C.
SocketType
D.
Socket
【简答题】But there are many trade fairs held in North America, how did you choose the right one? W e asked __________________to provide us with attendance statistics, delicate profiles and ____________________...
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