个人独资企业清算结束后,投资人或者人民法院指定的清算人应当编制清算报告,并于( )日内到登记机关办理注销登记。
A.30
B.20
C.15
D.45
参考答案:C
组成核酸的基本单位是
A.含氮碱基B.单核苷酸C.多核苷酸D.核糖核苷E.脱氧核糖核苷
He was in hospital for 6 months. He felt as if he was ______ from the outside world.
A.cut off
B.cut up
C.cut through
D.cut out