团藻在动物演化上有重要意义，其分类地位是（）。
A、海绵动物门
B、原生动物门
C、腔肠动物门
D、扁形动物门
参考答案：B
—Excuse me, Could you tell__________?
—Yes. Go along this street and you will find it on your left.
A．where is the museum
B．which is the way to the museum
C．how far is the museum
D．how can I get to the museum
工业起火最常见的原因是：（）起火，（）起火和（）起火。
