青少年癫癎的常见病因不包括()
A.遗传易感性
B.脑原发性或转移性肿瘤
C.外伤
D.感染
E.先天性畸形或代谢缺陷
参考答案:B
观察下面四幅图中,是由左图平移得到的是
A.
B.
C.
D.
Amy is the ______ student in our class, and Helen is the second ______ one. [ ]
A. best; best
B. best; better
C. good; better
D. better; best