放射治疗对于颅内肿瘤的效果

A．对所有颅内肿瘤均无效

B．对所有恶性颅内肿瘤均无效

C．对颅内恶性肿瘤及部分良性肿瘤效

D．仅对颅内良性肿瘤有效

E．仅对颅内恶性肿瘤有效

A:What’S the date today
B:It’S June 16.
A:(16)Then it’S Dragon Boat Festival today, isn’t it
B:Yes. (17)
A:Did you have rice dumplings this morning
B:Sure. (18)
A:I didn’t.
B:What a pity! But I happen to have got somewith me. (19)
A:I’d love to. By the way, why do you call it Dragon Boat Festival
B:Because in China, people race dragon boats this day every year。
A:0h, I see. (20)
B:You are welcome.
A．We Chinese usually eat rice dumplings the day.
B．I hate eating rice dumplings.
C．Thank you for your rice dumpling.
D．I don’think so.
E．Would you like to have one
F．Already
G．How about you