所有病毒的遗传物质是[ ]
A.DNA
B.RNA
C.DNA和RNA
D.DNA或RNA
答案:D
she never ______ to read the news but turned at once to the crossword on the last page.
A.indulged
B.troubled
C.exerted
D.frustrated
贷款新规规定,企业流动资金贷款的担保人信用等级应在A(含)以上。