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【单选题】
叶的光和能力于( )有关
A.
选择1叶面积的大小
B.
选择2叶色深浅
C.
选择3
D.
选择4以上都有
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举一反三
【单选题】The word 'override'(Line 2, Paragraph 1)most probably means
A.
protect.
B.
scorn.
C.
ignore.
D.
respect.
【单选题】There is supposed to be a safety _______ which makes it impossible for trains to collide.
A.
appliance
B.
accessory
C.
machine
D.
mechanism
【单选题】There is supposed to be a ____ which serves to give full play to workers’ initiative.
A.
mechanics
B.
machine
C.
mechanic
D.
mechanism
【简答题】There is supposed to be a safety ________ which makes it impossible for trains to collide. A) appliance B) accessory C) machine D) mechanism
【单选题】当555的定时器的6号端输入电压小于 ,2号端输入电压小于 时,555定时输出端3号端子的状态为( )
A.
低电平
B.
高电平
C.
不确定
【单选题】555定时器的TH端电平小于2UDD /3 ,端电平大于UDD /3时,定时器的输出状态是( )。
A.
0 态
B.
1 态
C.
原态
【简答题】There is supposed to be ________rain this year.
【简答题】large in amount 2.real 3.ignore or reject 4. work 5. announce publicly
【简答题】将下列英文单词翻译成中文: 1. logo 2. imitation 3. admire 4. preference 5. poison 6. the Allied Forces 7. decode 8. achievement 9. develop 10. ignore
【单选题】There is supposed to be a safety _____ which makes it impossible for trains to collide.
A.
mechanism
B.
accessory
C.
appliance
D.
machine
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