阵发性高血压型嗜铬细胞瘤发作的诱因包括（）
A.扪压肿瘤
B.体位改变
C.小便
D.情绪激动
E.吸烟
参考答案：A, B, C, D, E
下列定额中，属于生产性定额的是()。
A.预算定额
B.施工定额
C.概算定额
D.概算指标
American people were proud and optimistic because they felt they had saved the world and now were helping to rebuild Europe and Japan.
A．True
B．False
