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【单选题】
对于一个C类网络,要划分出6个子网,则子网掩码是()
A.
255.255.255.0
B.
255.255.255.192
C.
255.255.255.224
D.
255.255.255.248
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【单选题】小王想 用定时器 T0 作计数 , 软件启动,用方式 2 ,则 TMOD 初始化编程为 。
A.
TMOD=0x06
B.
TMOD=0x50
C.
TMOD=0x10
D.
TMOD=0x60
【单选题】下列词语中加点字注音完全正确的一项是( )
A.
教诲(huì) 贮蓄(chǔ) 衰草连天(shuāi)
B.
呵斥(hē) 怡情(yí) 锲而不舍(qì)
C.
惆怅(chóu) 提防(dī) 潜心贯注(qián)
D.
梦寐(mèi) 哺育(pǔ) 奄奄一息(yǎn)
【单选题】Tragically, the young poet died in hospital from a bacterial _______.
A.
infection
B.
injection
C.
instruction
D.
indication
【单选题】小王想用定时器T1作计数,软件启动,用方式2,则TMOD初始化编程为 。
A.
TMOD=0x06;
B.
TMOD=0x50;
C.
TMOD=0x10;
D.
TMOD=0x60 ;
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【多选题】下列物质属于弱电解质的是
A.
次氯酸
B.
氟化氢
C.
溴化氢
D.
高氯酸
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A.
NaCl
B.
HCl
C.
KOH
D.
H 2 CO 3
【单选题】下列物质属于弱电解质的是
A.
氢氧化钠
B.
醋酸
C.
盐酸
D.
碳酸钠
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A.
American teenagers are spending whatever they can instead of putting aside the money they make.
B.
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C.
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D.
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