当女方剖腹产后、哺乳期、长期服用口服避孕药的间歇期及患各种慢性疾病时,首选的避孕措施是()
A.宫内节育器
B.紧急避孕药
C.避孕套
D.外用避孕药
参考答案:C
I had been puzzled over the problem for over an hour without any result, all at once a solution flashed across my mind.
A.while
B.when
C.then
D.as
PC与交换机建立连接后,操作界面出现交换机普通用户操作提示符“>”,输入()进入特权用户模式。
A.enable
B.config terminal
C.int vlan
D.shutdown