炭和石墨制品常用原料（）在煅烧后的比电阻是600-760Ω·mm2/m。
A、石油焦
B、沥青焦
C、冶金焦
D、无烟煤
参考答案：B
大豆与绿豆发芽制成豆芽，可增加的营养素是（）
A.视黄醇
B.硫胺素
C.核黄素
D.抗坏血酸
E.烟酸
1. —Does your brother has lessons on Saturdays?
—No, he doesn't.( )
2. —Let's going to the park today.
—OK. ( )
3. —There isn't some water in the glass.
—Would you please get some for me? ( )
4. —You are a teacher, right?
—Yes, I'm. ( )
5. He is good at play football. ( )
