汁一般包括色泽种类、味型种类、用途种类三大类。( )
参考答案：对
He is a man of few words, and seldom speaks until _______ to.
A．speaking
B．spoken
C．speak
D．be spoken
主要含神经毒的毒蛇是（）
A.竹叶青蛇
B.尖吻蝮蛇
C.眼镜王蛇
D.烙铁头蛇
E.银环蛇
