题目

 He said that his friend ______ there three days before, but she was not there_______. A. had been; now   B. has been; then    C. had been; then   D. was; now 答案：C（2015•万州区校级模拟）制作临时装片时，为了避免盖玻片下产生气泡，盖盖玻片时应将盖玻片（）A．一边先接触水滴，然后轻轻放下B．一边先接触水滴，然后快速放下C．轻轻平放下，然后轻轻一压D．轻轻平放下，然后用力一压