I'm weak in English. Li Yan often _______ me _______ my English.
A:help, with
B:helps, with
C:helping, in
D:to help, in
△ABC中,点A(4,-1),AB的中点为M(3,2),重心为P(4,2),则边BC的长为 ( )
A.将木块平放在海绵上,如图甲;
B.将木块竖直放在海绵上,如图乙;
C.将两个木块叠加在一起,然后平放在海绵上,如图丙.
请回答:
对“痰”和“唾液”的有关叙述中,正确的是( )