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【简答题】
常用于标定 HCl 溶液浓度的基准物质有 ( );常用于标定 NaOH 的基准物质有( ) 。 A. Na 2 CO 3 B. H 2 C 2 O 4 ·2H 2 O C. Na 2 B 4 O 7 ·10H 2 O D. KHC 8 H 4 O 4
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反馈参考答案：
举一反三
【单选题】What is the most suitable word that describes the work of a policeman according to the passage?
A.
Dangerous.
B.
Demanding.
C.
Distressing.
D.
Dramatic.
【简答题】What is the most suitable word that describes the work of a policeman according to the passage? A) erous B) Demanding C) Distressing D) Dramatic
【单选题】Synchrocope and synchro light are located on ____ of main switchboard.
A.
load panel
B.
emergency generator control panel
C.
battery changing and discharging panel
D.
paralleling panel
【单选题】-----______ are the students talking ______? ----- A policeman.
A.
What, with
B.
Who, for
C.
Who, to
D.
What, to
【多选题】关于同步码SYNC_UL下列说法正确的是（）
A.
随机接入的特征信号称为SYNC_UL，在上行导频时隙发射；
B.
整个系统有256个不同的基本SYNC_UL，分成32组，每组8个；
C.
SYNC_UL码的长度为128chip；
D.
与SYNC_UL有关的过程有上行同步的建立和初始波束成形测量；
【单选题】What is the most suitable word that describes the work of a policeman according to the passage? ______.
A.
Distressing.
B.
Dramatic
C.
Dangerous.
D.
Demanding.
【单选题】-What does your uncle do? -He is a policeman. -__________ dangerous job it is! [ ]
A.
What a
B.
What an
C.
How
D.
How a
【多选题】以下码中，属于正交码的有()
A.
SYNC_DL码
B.
SYNC_UL码
C.
基本midamble码
D.
midambleshift码
E.
OVSF码
F.
扰码
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