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【简答题】
控制输入步进电动机的 就可以控制位移量。
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【单选题】如图,74LS161D的CLR引脚为( )时,芯片清零,使输出的信号立即为零。
A.
高电平
B.
低电平
【单选题】如图,74LS161D的引脚为( )时,芯片置数,使输出的信号等于输入的信号。
A.
高电平
B.
低电平
【单选题】在正常成人通常能听到的心音有几个
A.
1个
B.
2个
C.
3个
D.
4个
E.
5个
【单选题】集中供热系统热负荷中的通风空调热负荷与气候条件密切相关,对通风空调热负荷的大小起决定性作用的是( )。
A.
室外风速
B.
室外风向和风速
C.
室外温度
D.
室外湿度
【单选题】Which conversation uses the proverb 'Curiosity killed the cat' correctly?
A.
A: Hey, nice to meet you! Where are you from? B: Haven't you heard that curiosity killed the cat?
B.
A: Mary, don't get so close to that dog! B: I just want to see if it is soft. A: Well, remember that curiosity killed the cat.
C.
A: What's the meaning of life? Why am I alive on this planet? What's my purpose? B: Who cares? Curiosity killed the cat.
D.
A: Do you know if we have a vocab quiz next week? B: Don't ask me. Curiosity killed the cat.
【简答题】Part I I : Section A. Conversation 2. Listen to the conversation again and match Column one which includes three persons ’ names with column two which includes some phrases to describe people_______ 、...
【单选题】以下条形码中支持字符“f”的编码的是( )。
A.
库德巴码
B.
39码
C.
EAN-128码
D.
UPC码
【单选题】休克时最常出现的酸碱失衡是
A.
代谢性碱中毒
B.
AG升高性代谢性酸中毒
C.
呼吸性酸中毒
D.
AG正常性代谢性酸中毒
E.
呼吸性碱中毒
【单选题】Which conversation is more formal?
A.
a: Bye for now. b: OK. Bye. See you later.
B.
a: Good night. It was lovely to see you. b: Thanks for coming. I hope you have a safe journey.
C.
a: Bye, then. Have a good day. b: Thanks, bye.
D.
a: See ya. b: Bye.
【简答题】脊柱骨折占所有骨折总数的(),其中30%-40%造成瘫痪。
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