皮皮学,免费搜题
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【多选题】
在高校毕业生就业协议书上签字的包括哪几方?( )
A.
毕业生本人
B.
用人单位(招聘单位)
C.
学校(培养单位)
D.
政府人社部门
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【多选题】下列哪些阀门安装有方向要求
A.
截止阀
B.
闸阀
C.
止回阀
D.
旋塞阀
【单选题】当理想空载转速n0相同时,闭环系统的静差率是开环系统下的( )倍
A.
1
B.
0
C.
1+K
D.
1/ (1+K)
【单选题】当理想空载转速n0相同时,闭环系统的静差率Sop与开环下的Scl之比为( )。
A.
1
B.
0  (K为开环放大倍数)
C.
1+K
D.
1/(1+K)
【单选题】The pencil ___she is drawing is his.
A.
with which
B.
in which
C.
on which
D.
by which
【单选题】教师焦虑的成因是()。①教师的收入低②教师的心理特点③工作量太大、学生难教育、升学压力大④教师之间竞争激烈
A.
①②③④
B.
①②③
C.
②③
D.
【单选题】当理想空载转速n0相同时,闭环系统的静差率与开环下的之比为( )
A.
1
B.
0 (K为开环放大倍数)
C.
1+K
D.
1/(1+K)
【单选题】The pencil ______she is writing is mine.
A.
with which
B.
in which
C.
on which
D.
by which
【单选题】Read the paragraph from the section "Sara Is Careful With Her Pencil." To write, Sara holds her pencil between her arms. She looks at the letter shapes. Then she carefully draws each point and curve. ...
A.
the prize that Sa ra will ge t
B.
the way that Sara writes
C.
the contest that Sara won
D.
the school that Sara goes to
【单选题】当理想空载转速n0相同时,闭环系统的调速范围D与开环下的D之比为( )。
A.
1
B.
0
C.
1+K
D.
1/(1+K) (K为开环放大倍数)
【简答题】当理想空载转速 n0 相同时 , 闭环系统的静差率 与开环下的 之比为 。
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