车讯:配电子涡轮增压 奥迪新SQ5最大功率提升

百度 开展以品老字号佳肴、展老字号技艺、促老字号发展、塑老字号形象为主题的促消费活动。

???????????????? ????? ???? (International System of Units) ??? ??????? ???? ? ???????????????? ????? ???????? SI ??? ??????????????? Système International d'unités?? ????? ????????? ???????? ????????

??????? ???? ??? ????? ????????? ????? ??????? ???? ????????? ????? ???????? ??????????

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Base units of measurement

Metric System (SI) prefixes

yotta-	Y	1 000 000 000 000 000 000 000 000
zetta-	Z	1 000 000 000 000 000 000 000
exa-	E	1 000 000 000 000 000 000
peta-	P	1 000 000 000 000 000
tera-	T	1 000 000 000 000
giga-	G	1 000 000 000
mega-	M	1 000 000
kilo-	k	1 000
hecto-	h	100
deca-	da	10
		1
deci-	d	1/10
centi-	c	1/ 100
milli-	m	1/ 1 000
micro-	μ	1/ 1 000 000
nano-	n	1/ 1 000 000 000
pico-	p	1/ 1 000 000 000 000
femto-	f	1/ 1 000 000 000 000 000
atto-	a	1/ 1 000 000 000 000 000 000
zepto-	z	1/ 1 000 000 000 000 000 000 000
yocto-	y	1/ 1 000 000 000 000 000 000 000 000

???????????????? ????? ???? ? ?????? ????????? ??? ????????????????? ????? ??????????????????? ?????? ? ??????????????? ????? ????? ??????? ??????? ?????? ????? ? ?? ???????? ?????? ???????????????????????? ???????? ??????????? ????? ???????????? ????????????????? ?????? ????????

1. ???? (m)
2. ????????? (kg)
3. ??????? (s)
4. ??????? (A)
5. ???????? (K)
6. ????? ????? (mol)
7. ????????? ????? (cd)

??????? ??????????? ???? ????????

?????????????????

1. ??????? (rad)
2. ????? (Hz)
3. ?????? (N)
4. ?????? (Pa)
5. ????? (J)
6. ??? (W)
7. ????????? (C)
8. ???? (V)
9. ????? (F)
10. ????? (Ω)

????????? ????? ?????????????????

?????????????? ????? ????????????????????? ??????????

Named units derived from SI base units

????	???????	Quantity	Expression in terms of other units	Expression in terms of SI base units
?????	Hz	???????????	1/s	s?1
??????	N	???, ?????????	m?kg/s2	m?kg?s?2
pascal	Pa	?????, stress	N/m2	m?1?kg?s?2
?????	J	????????, work, ???	N?m	m2?kg?s?2
???	W	power, radiant flux	J/s	m2?kg?s?3
?????????	C	electric charge or electric flux	s?A	s?A
????	V	voltage, electrical potential difference, electromotive force	W/A = J/C	m2?kg?s?3?A?1
farad	F	electrical capacitance	C/V	m?2?kg?1?s4?A2
ohm	Ω	electrical resistance, impedance, reactance	V/A	m2?kg?s?3?A?2
siemens	S	electrical conductance	1/Ω	m?2?kg?1?s3?A2
weber	Wb	magnetic flux	J/A	m2?kg?s?2?A?1
tesla	T	???????????????	V?s/m2 = Wb/m2 = N/A?m	kg?s?2?A?1
henry	H	inductance	V?s/A = Wb/A	m2?kg?s?2?A?2
????????????	°C	???????????? ????????	T°C = TK ? 273.15	K
lumen	lm	luminous flux	cd?sr	cd
lux	lx	illuminance	lm/m2	m?2?cd
becquerel	Bq	?????????????????? (decays per unit time)	1/s	s?1
gray	Gy	absorbed dose (of ionizing radiation)	J/kg	m2?s?2
sievert	Sv	equivalent dose (of ionizing radiation)	J/kg	m2?s?2
katal	kat	catalytic activity	mol/s	s?1?mol