对于流感病毒来说,实验室检测方法包括哪些()
A、病毒分离
B、核酸检测
C、病毒抗原检测
D、血清学诊断
E、显微镜观察
参考答案:A, B, C, D
在一张日历表中,用正方形圈出4个数,这4个数的和可以是78吗?简要说明你的理由.
--- Sorry, honey. I’m afraid we are too busy to take a holiday at the present time.
--- Could we take ______ two weeks from now?
A.one
B.that
C.it
D.a one