慢性胆囊炎超声多表现为壁厚、腔大、张力大。（）
参考答案：错
One of the effective ways to lessen environmental pollution is the reservation and protection of more swamps .
A．vast thick corals
B．pockets of wet land
C．warm volcanoes
D．millions of bees and wasps
教师劳动的创造性表现在哪些方面？
