①增大氢气的浓度 ②升高温度 ③降低温度 ④缩小体积 ⑤增大HI的浓度 ⑥减小压强.
A:①③⑥
B:③⑤⑥
C:①③⑤
D:②④⑤
(Ⅰ)求f(x)的解析式;
(Ⅱ)对任意m∈(0,2,关于x的不等式f(x)< 12 m3﹣mlnm﹣mt+ 72 在x∈(﹣∞,1上恒成立,求实数t的取值范围.
Beethoven is a very____ (著名的)musician .I'm____ (紧张的)out because I can't find the way home.My mother often____ (担心)about my father's health..She likes to s____ e-mails at school.Lily is very t____ , she'd like to have some water.