What will you_____ about the topic “How to learn English well” at the meeting tomorrow?
A:speak
B:say
C:tell
D:talk
279×6+221×6=____
本实验中,小阳将A、B两个玻璃瓶在温暖的地方放置了一夜,你认为要放置在“温暖的地方”的理由是____ 。