_______ students enjoys the beautiful flowers.
A. Each
B. All
C. All the
D. Each of the
答案:D
Although she felt tired, she didn’t stop working.
A.She felt tired, she didn’t stop working.
B.She felt tired, so she stopped working.
C.But she felt tired, she didn’t stop working.
D.She felt tired, but she didn’t stop working.
80x86 CPU寄存器中负责与I/O端口交换数据的寄存器为 【12】 。