9700/11 Biology May Jun 2017 Online Test | Cambridge AS and A Level MCQ
Cambridge
AS & A Level
Biology (9700)
شهریور
2017
مشاهده نمونه سوال
شامل مباحث:
AS Level
تعداد سوالات: 40
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
60 دقیقه

پیش نمایش صفحه اول فایل
The graph shows the fall in cases of tuberculosis (TB) in a country between 1910 and 2000.
Which factors could have contributed to the fall over this period?
1) pasteurisation of milk
2) the provision of new housing
3) chemical treatment of sewage
4) identification of contacts of people infected with TB