下列哪个选项不能作为property的可选属性（）
A: alloc
B: retain
C: atomic
D: strong
A: alloc
B: retain
C: atomic
D: strong
举一反三
- 下列选项中，哪个是在;标签中必须出现的属性？（ ） A: name B: value C: param D: property
- 下列选项中，属于transition-property属性值的是（）。 A: none B: all C: both D: property
- "下列选项中，哪个不能作为子网掩码？";
- Many Russian people retain strong material and psychological ties to the countryside.
- Which of the following is true of a mortgage ______. A: The mortgagee retains possession of the mortgaged property B: The mortgagor retains possession of the mortgaged property C: The lender acquires the right to retain the mortgaged property until the mortgage debt is repaid D: None of the above