【单选题】What lesson could be drawn from the accident?
A.
Accurate communication is of utmost importance.
B.
Pilots should be able to speak several foreign languages.
C.
Air controllers should keep a close watch on the weather.
D.
Cooperation between pilots and air controllers is essential.
【判断题】NA是表征光纤数值孔径的一个参数,用来表示光纤的聚光能力。NA越大,表示其聚光能力越强。
【判断题】中国的气侯大多数地方实际上是季风气候()
【单选题】课程目标分为总目标和学段目标,从知识技能、( )、问题解决、情感态度等四个方面加以阐述。
【单选题】What can be inferred from the last paragraph?
A.
Whether or not to have a nucleus is important in biology.
B.
The speaker will tell us how to distinguish bacteria tomorrow.
C.
Evolution will be the main topic, of the program next time.
D.
Eukaryotes develop from prokaryotes.
【简答题】若某设备工程项目的净现值指标大于零,则以下选项中正确的有( )。