进行现况研究时，调查时间通常确定在（） A.一年内 B.若干年内 C.短时期内或某个

根据下列句子的意思，用括号中所给词的正确形式填空，每空限填一词。

1. It's ________ ( possible) to master English if you don't have enough practice.

2. The lecture was so ________ (bore) that some people fell asleep while listening.

3. Nothing can prevent us from ________ ( realize) our dreams.

4. Many foreigners enjoy Chinese fashion, ________ ( especial) the Tang costume.

5. No one can ________ ( success) without any hard work.

6. Though he has grown up，he isn’t brave e________ to go out alone at night.

7. The living conditions in the countryside have ________ (改善)a lot.

8. The children didn't go to bed u________ their mother came back.

9. Now parents are ________ (花费)more and more money on their children's education.

10. Most people think bicycles are much safer than other v________ .

开发校本课程就意味着要编写教材。 （ ）改为：

沃尔维尔的适应水平理论认为，三种环境刺激可以在以下哪些维度水平上发生变化？（）

A.强度

B.刺激的多样性

C.刺激的时间

D.刺激的模式

环境影响经济损益分析步骤中，（）是最关键的一步，也是环境影响经济评价的核心。

A.筛选环境影响

B.将货币化的环境影响价值纳入项目的经济分析

C.量化环境影响

D.评估环境影响的货币化价值

净料率