[填空题]Nanotechnology has resulted in a wide range of amazing, practical discoveries such as stain- resistant trousers and self-cleaning toilets.

[填空题]Nanotechnology has resulted in a wide range of amazing, practical discoveries such as stain- resistant trousers and self-cleaning toilets.

[填空题]The United States has a wide range of policies that are explicitly designed to promote global corporate responsibility.

[填空题]What the scientists learned at Range Creek has begun to help them uncover one of the greatest mysteries of______.

[填空题]The U. S has a wide range of public policies that undermine global corporate social responsibility.

[填空题]A normal range has been established for body temperature, blood pressure, pulse, height, etc. for health.

[单项选择]Despite the wide range of reading material specially written or ________ for language learning purposes, there is yet no comprehensive systematic program for the reading skills.
A. appointed B. assembled C. acknowledged D. adapted

[填空题]Each unit contains a wide range of practice material, and it may not be possible to cover all the work in class in situations where class-time is limited. The teacher should then decide which exercises are most appropriate to the specific needs of his students, and which can be omitted.Similarly, many of the exercises can be given to students to do as homework or self-study work. The writing tasks in Section I at the end of each unit are mmeant to be alternatives (选择余地), from which the student or the teacher chooses the most interesting or most appropriate. Students on intensive courses (精读课程) may, of course, have the time to do more than one of the tasks.
The units of the course vary slightly in length and level of difficulty, becoming progressively longer and more difficult through the book. Because of this, and the obvious variation (变化) in classroom situations, it is not possible to specify how much class time would be needed to complete a unit. But, as an approximate (大概的)