皮皮学，免费搜题
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【多选题】
根据控制点的不同,控制可以划分为哪几种类型?A.
前馈控制
B.
现场控制
C.
反馈控制
D.
战略控制
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】It is very kind ____ you to help me with my lessons. It is hard ____ me to learn them well.
A.
of; for
B.
of; of
C.
for; of
D.
for; for
【单选题】It is very kind of you to do the washing-up, but you it.
A.
mustn’t have done
B.
wouldn’t have done
C.
mightn’t have done
D.
didn’t have to do
【单选题】It is very kind _______ you to help me with my housework. It is hard _____me to do all the work.
A.
of, for
B.
for, of
C.
of, to
D.
to, for
【单选题】It is very kind ______ you to help me with my lessons. It is difficult ______ me to learn them well. [ ]
A.
of, of
B.
for, of
C.
of, for
D.
for, for
【简答题】IEEEE802.15.4标准定义的无线个域网具有哪些特点?
【简答题】为什么说教育心理学是介于自然科学与社会科学之间的一门交叉学科？
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