发行人及其主承销商中止发行后重新启动发行工作的，应当及时向( )报告。
A．保荐人
B．证券交易所
C．中国证监会
D．承销商
参考答案：C
Microblogs experienced rapid growth in 2013 in China, with its operators, users and visitors several times.
A．increase
B．increased
C．increasing
D．to increase
1/12×13+1/13×14+…+1/19×20( )
A．1/12
B．1/20
C．1/30
D．1/40
