正比例函数y=x的大致图象是( )
A:
B:
C:
D:
(1)log535-2log573+log57-log51.8-5log52.
(2)已知α∈(0,π),sinα+cosα=15,求tanα.
Results of not enough sleep
harm your problem-solving ____
____ your heart
lead to ____sleepiness
Ways to get better sleep
limit wine drinking ____ to bedtime
get ____ minutes of sunlight
在豌豆植株的叶肉细胞中,细胞质内含有的糖类和核酸主要是