质数一定不是2、3、5的倍数。
关于能源,下列说法正确的是( )
点P为线段MN上一点,点Q为NP中点.若MQ=6,则MP+MN=( )
84是(十)位数.
—Can you come to my birthday party tomorrow?
—__________. I have a lot of homework to do.