【单选题】珍珠中的珍珠质是由珍珠蚌的什么结构分泌形成的( )。
【单选题】微型计算机存储系统中, PROM 是( )。
A.
微型计算机存储系统中, PROM 是( )。
【单选题】----- His long ______ speech made the audience very ______ . -----No wonder many people fell asleep.
【单选题】—I wonder ________ so many people are crazy about Gangnam Style. —It's good for bodybuilding, and it brings people a lot of fun, you know.
【单选题】It has been five years since the party _____. Many people wonder whether it will stay on. [ ]
【单选题】Cotton_____ in the southeast of China.
B.
are grown [ 来源 : 学 + 科 + 网