单选题：We learn from the passage that a child has boundless curiosi

题目内容：

We learn from the passage that a child has boundless curiosity（　　）. A．when he is tw
B．when he is around fou
C．when he is si
D．when he is eigh

参考答案：

答案解析：

根据下列文章,请回答题。A Desert Between Paul and ClaraPaul had long pro

根据下列文章,请回答题。A Desert Between Paul and ClaraPaul had long promised to marry Clara

分类：综合类题型：单选题

关于运行中的垃圾填埋场的环境影响，说法错误的有（　）。A．填埋场机械噪声不会对公众产生影响B．填埋场渗滤液泄漏会污染地下水及地表水C．填埋垃圾中的塑料袋、纸张、

分类：综合类题型：单选题

The phrase "turning out" in the last paragraph could be best replaced by（　　）.A．"

分类：综合类题型：单选题

土围堰堰顶的宽度可为1.0～2.0m，当采用机械开挖时，应视机械的种类而定，但不宜小于（　　）。 A．2.0m B．3.0m C．4.0m D．2.5m

分类：综合类题型：单选题

分类：综合类题型：单选题