下面关于电子邮件恶作剧的陈述中哪些是正确的?()
A.它比病毒感染的电子邮件的危险性要小一些
B.它与病毒感染的电子邮件一样危险
C.它包含恶意代码
D.它包含恶意附件
参考答案:B
-Have you had your breakfast yet?
-Yes. Mom _____it for me. [ ]
A. was cooking
B. is cooking
C. will cook
D. cooked
下列结构①脑 ②脊髓 ③脑神经 ④脊神经,属于周围神经系统的是
A.①②
B.③④
C.①③
D.②④