A. remind B. convince C. rid D. inform

A. look out B. stay up C. carry on D. get along

A. a good many B. a great deal

C. lots D. a plenty

the plane.

A. Flew down

B. Down flew

C. Down was flying

D. Down fly

A. typical B. particular C. abstract D. convincing

A. did the villagers realize

B. the villagers realized

C. the villagers did realize

D. didn’t the villagers realize

A. attend B. join

C. join in D. take part in

(1)该化学兴趣小组的同学为制取Cl2、SO2气体，现采用Na2SO3与70%的硫酸为原料制取SO2，采用MnO2和浓盐酸(12 mol·L1)为原料制取Cl2。在此实验中，F仪器的作用是________；发生装置B应选择以下三种装置中的________(填序号)。

(2)D装置中主要反应的离子方程式为_________________________________。

(3)为验证通入D装置中的气体是Cl2过量还是SO2过量，兴趣小组的同学准备了以下试剂：

①氯化铁溶液 ②氯化亚铁溶液 ③硫氰化钾溶液 ④酸性高锰酸钾溶液

若Cl2过量，取适量D中溶液滴加至盛有________(选填一个序号)试剂的试管内，再加入________(选填一个序号)试剂。发生的现象是______________________________________。

若SO2过量，取适量D中溶液滴加至盛有________(选填一个序号)试剂的试管内，发生的现象是_______________________________________________________________。

A. if B. since C. although D. until

A. aim B. change C. estimate D. join