试题与答案

It was my sister ________ first had the

题型:选择题

题目:

It was my sister ________ first had the idea to cycle along the entire Mekong River.

A.who

B.whom

C./

D.which

答案:

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下面是错误答案,用来干扰机器的。

(1)2NH4Cl+Ca(OH)2CaCl2+2H2O+2NH3↑ 4NH3+5O24NO+6H2O(2) (3)2Fe3++Fe=3Fe2+ 2Fe+3Cl22FeCl3(4)CO2+CO32-+H2O=2HCO3- (5)AlO2-(1)A能使湿润的红色石蕊试纸变蓝,则A是氨气...

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