A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?() The motion of the apparent sun is along the ecliptic。 Measurement of time is along the celestial equator。 The speed of the Earth's revolution is not constant。 There are variations in the Earth's rotational speed。
1841年,受十二代将军家庆信任的水野邦忠被任命为首席老中,在其主导下进行“天保改革”。主要措施不包括()。 精简幕府机构,推行节俭政策。 抑制商业和手工业,颁布《解散行会令》,促进商品自由流通。 整顿赋税制度,进行“检地”以增加税收。 再次颁布《返乡令》,禁止农村人口流入城市。
The piston moves up and down, thus causing the rotational movement of the() crankshaft。 connecting rod。 cross-head。 main beating。
气胀式救生筏结构主要有()。 ①筏体 ②蓬柱 ③蓬帐 ④筏底 ⑤附属设备 ①②③。 ①②③④⑤。 ①②③⑤。
A major health hazard of the product tert-butylamine is that it (). can be absorbed through the skin。 causes irreversible damage to eye tissue。 is a very unstable product。 All of the above。
下列哪些业务招商银行不得受理他人代办申请的有()。