题目

阅读理解 Welcometo my classroom! I'm David. This is my schoolbag. It's black and white. Mypencil box and books are in it .What's in the pencil box? A ruler, two pencils,a pen and an eraser are in the pencil box. The ruler is white. It's new (新的).The pencils are nice. They are black and red. The red one isn'tmy pencil. It's Jim's. The pen is black. It writes(写) very well. Look! The ruler is white. It is Lucy's ruler. She hastwo, and she givesoneto me. The eraser is white. I take these things to my school every day. （1） What color is the school bag? A . black and red B . 在△ABC中，AB=，A=45°，C=75°，则BC=（ ）A．B．C．2D．