茎甚短，莲座叶丛基部抱合，呈杯状，可以贮水而不漏，故称（）
A.倒挂金钟
B.冷水花
C.水塔花
D.花叶芋
参考答案：C
--_____ of the population of the city _____workers?
--About 60 percent.
A．What; is
B．What; are
C．How much; is
D．How much; are
中气下陷，可引起
A．咳逆上气B．恶心呕吐C．头痛、头胀、面红目赤D．胃脘痛E．脘腹有重坠感
