The fundamental issue in the current debate is whether environmental lead contamination (环境铅污染) causes __________ impairment (受损) in children.
举一反三
- environmental issue
- 客舱空气污染是一个重要问题。 A: Contamination of cabin air can be an important problem. B: Contamination of cabin air can be a considerable problem. C: Contamination of cabin air can be a fundamental problem. D: Contamination of cabin air has priority.
- Which of the following would most likely lead to carbon monoxide contamination of the cockpit atmosphere?
- （ ） to lead is known to damage the brains of young children.
- mercury contamination A: 水银污染 B: % C: @