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【单选题】
可编程控制系统由( )、编程器、信号输入部件、输出执行部件等组成。A.
可编程线控制器
B.
单片机
C.
DSP
D.
HMI
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】— How long has he been in the army?— Oh, he joined the army as far______as .
A.
ago
B.
away
C.
from
D.
back
【简答题】长沙菊花石主要产于什么地方？
【单选题】He served in the army in whenhe was in
A.
． 1940’s ； his twenties
B.
． the 1940s ； thetwenties
C.
． 1940s’ ； histwenties
D.
． the 1940’s ； his twenties
【单选题】The boss of the company is as _____ as a young man and hates sitting around doing nothing at all. [ ]
A.
enthusiastic
B.
sensitive
C.
energetic
D.
talkative
【简答题】the robot army__________
【单选题】---Does your brother serve in the army? ---No, not now. But he ________ in the army for 8 years.
A.
would serve
B.
was serving
C.
had served
D.
served
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