【单选题】What is NOT mentioned as a benefit for family members?
A.
A personal training session
B.
A voucher that can be used at a local store
C.
Free classes for a month
D.
Access to a swimming pool
【单选题】对于不透明物体,其颜色是在物体吸收其他颜色光线前提下,反射光线的颜色。白色花朵表示将所有颜色的光全部反射,而黑色花朵表明所有颜色的光全部被花朵吸收。花的组织,尤其是花瓣,一般较为柔嫩,易受高温伤害。据此可以判断自然界中品种最少的花是
【单选题】What is not mentioned as the reason why working affects students’ school performance?
A.
Working students are not able to get along well with their classmates.
B.
Working students do not have enough time to do homework.
C.
Students who work long hours are often used to spending their earnings on drugs and alcohol.
D.
Working long hours makes students too tired to study.
【单选题】如图所示的圆简壁稳态导热问题。内外壁分布给定温度n和,材料导热系数为常数,温度分布曲线示意图应为:
【判断题】人的心理现象千发万化,其复杂无规律可循。
【单选题】What is NOT used as a stern tube bearing,on a large vessel?
A.
Wooden (lignum vitae) strips
C.
Resin bonded composition
【多选题】关于“载流子的扩散运动”,以下说法正确的是:
A.
均匀掺杂的半导体,处于热平衡状态时,不产生扩散运动
D.
不论是平衡载流子还是非平衡载流子,只要存在浓度梯度,都会产生扩散运动
【单选题】对于不透明物体,其颜色是在物体吸收其他颜色光线前提下,反射光线的颜色。白色花朵表示将所有颜色的光全部反射,而黑色花朵表明所有颜色的光全部被花朵吸收。花的组织,尤其是花瓣,一般较为柔嫩,易受高温伤害。据此可以判断自然界中品种最少的花是