橙色在空气中的穿透力仅次于红色，而色感较红色更暖，最鲜明的橙色应该是色彩中感受最暖的色，能给人有（）等感觉，所以基本上属于心理色性。

A.庄严

B.尊贵

C.兴奋

D.神秘

Teams are required for most engineering projects. Although some small hardware or software products can be developed by individuals, the scale and complexity of modern systems is such, and the demand for short schedules so great, that it is no longer (1) for one person to do most engineering jobs. Systems development is a team (2) ,and the effectiveness of the team largely determines the (3) of the engineering. Development teams often behave much like baseball or basketball teams. Even though they may have multiple specialties, all the members work toward (4)．However, on systems maintenance and enhancement teams, the engineers often work relatively independently, much like wrestling and track teams. A team is (5) just a group of people who happen to work together. Teamwork takes practice and it involves special skills. Teams require common processes; they need agreed-upon goals; and they need effective guidance and leadership. The methods for guiding and leading such teams are well known, but they are not obvious.

空白（5）处应选择（）

A.relatively

B./

C.only

D.morethan