下面哪项不属于不良睡眠卫生习惯()
A.噪音过大
B.卧室光线太暗
C.室温过高或过低
D.睡眠时间无规律
E.睡前从事易兴奋活动
参考答案:B
Who was the first one ________? [ ]
A. to reach
B. to arrive
C. to get to
D. to arrive at
设备、材料采购的邀请招标,受邀参加投标的单位不得少于()家。
A.3
B.5
C.7
D.4