is well-known, China is a       country.

A．It; developing

B．As, developed

C．That; developing

D．As; developing

下列人类活动最容易造成哪些污染？请你用直线连接起来．

修建玻璃幕墙               ①水污染

建筑施工                   ②土壤污染

农田施用化肥               ③大气污染

燃烧煤炭                   ④噪声污染

使用含磷洗衣粉             ⑤光污染．