营养液的适宜pH为5.5-6.5，可利用pH试纸或酸度计测定。
A. 对
B. 错
You must be punctual when you get to your interview appointment.
A. 对
B. 错
细根和根量少的植物施肥过多会造成盐浓度危害。
A. 对
B. 错
Do not fiddle with objects such as jewelry, your hair or pens when you first meet your interviewers.
A. 对
B. 错
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