Rather than ______ at home , I prefer to go sightseeing in ___________.

A．stay; so suuny a day

B．to stay; so a suuny day

C．stay; how sunny a day

D．staying; such a sunny day

小儿腹泻脱水无明显循环障碍时，前8小时最合适的补液速度[ml/(kg·h)]是

A．2～4
B．5～7
C．8～10
D．11～13
E．14～16