证券投资基金是通过公开发售()募集资金。
A.理财产品
B.有价证券
C.企业债券
D.基金份额
参考答案:D
Perhaps I’m not quite fit for the job, but , please let me have a try.
A.in fact
B.anyway
C.so
D.otherwise
体液中的溶菌酶能破坏多种病菌的细胞壁,使病菌溶解,失去致病性.这种免疫属于( )
A.人工免疫
B.计划免疫
C.特异性免疫
D.非特异性免疫