三型机器件温度变化超过()系统要自动进行热靶标定。
A.±4℃
B.±1℃
C.±2℃
D.±0.5℃
参考答案:C
下图是30°N地区几种朝向的窗户内每天可能受到太阳直接照射的时间曲线图。读图,回答1—2题。
1、该地区住宅窗户的下列朝向能使室内冬暖夏凉的是[ ]
A.南
B.东南
C.北
D.东北
2、如果该地区住宅窗户朝向西北,室内受到太阳直接照射时间最短的季节,游客可在[ ]
A.新疆摘葡萄
B.浙江采梅子
C.江西观桃花
D.重庆赏腊梅
Cultural Shock
According to the passage, people in the host country are thought to be largely indifferent to visitors’ troubles, because ______.
A.they are insensitive and unsympathetic
B.they are not fond of visitors
C.they do not mind others’ business
D.they consider the troubles not serious