环孢素的作用机制是()
A.抑制IL-2合成
B.抑制IL-2释放
C.抑制淋巴细胞
D.抑制T细胞的生长和反应
E.改变T细胞的生长和反应
参考答案:A, B, D, E
若f(sinx)=sin3x,则f(cos70°)=______.
—Sorry,Mum, I lost my key to the bicycle again.
—Oh! How_____ you be so careless! You have to learn to look after your belongings.
A.can
B.may
C.will
D.dare