【单选题】下列命题中,正确的是
B.
命题“ 为真”是命题“ 为真”的必要不充分条件
【判断题】换行符标记为〈br /〉,属于单标记。( )
【单选题】Which sign means you can't turn left? [ ]
【单选题】Which sign can you mostly see in the school library?
【单选题】Which of the following words can NOT be used to complete 'This is the place ______ I visited'?
【单选题】How are the pressure and temperature affected in a diesel engine cylinder during compression?
A.
Pressure and temperature decrease
B.
Pressure and temperature increase
C.
Pressure decreases and temperature increases
D.
Pressure increases and temperature decreases
【单选题】According to the passage, which of the following words can be used to describe an ambassador's work?
【单选题】下列命题中,正确的是
C.
命题“ 为真”是命题“ 为真”的必要不充分条件