阅读短文，判断正“T”误“F”。

      Jacky lives in an apartment in Canada. He's twelve years old. He goes to school five days a week. He always

eats breakfast at home. Then he usually goes to school by bus, but sometimes he rides his bicycle. He likes to

sing and play the guitar. He likes green and circles. He likes to have his boots and umbrella on a rainy day. What

about you?

( ) 1. Jacky is a student.

( ) 2. Jacky never eats breakfast at home.

( ) 3. Jacky always goes to school by bus.

( ) 4. Jacky likes to play the piano.

( ) 5. Jacky likes triangles.

配制高强、超高强混凝土，须采用以下哪种混凝土掺合料

A．粉煤灰
B．硅灰
C．煤矸石
D．火山渣