我市某一天的最高气温是8℃，最低气温是-2℃，那么这一天的最高气温比最低气温高（ ）℃。
10
证券投资咨询机构的从业人员可以代理客户进行证券投资。( )
For nearly 50 years, Spock has been a ______ author writing 13 books including an autobiography and numerous magazine articles.
A. prevalent B. precautious C. prospective D. prolific
