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【单选题】
一套管换热器,管内走液体,走饱和蒸汽(蒸汽冷凝)。由于液体入口温度下降,在流量不变的情况下,为仍达到原来的出口温度(此设备再提高压力强度已不允许),采取简便有效的措施为( )。A.
增加壳层数
B.
减少壳层数
C.
管内加麻花铁
D.
换封头
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【简答题】_________In business it can be harmful to be too unassuming . If you are overly modest about your achievements, for example, you may be passed up for a promotion.
【单选题】Which of the following statements is TRUE according to Paragraph 2?
A.
Habit can be harmful to the development of mankind.
B.
People usually like to taste new things at the risk of their lives.
C.
Most people hesitate to eat new things they have never tasted before.
D.
People are usually willing to try a new food if it is offered by a friend.
【单选题】完全劳动行为能力人是指身体健康，有完全行为自由，（ ）。[2013年5月二级真题]
A.
16—18岁的劳动者
B.
16岁以上的劳动者
C.
18岁以上的劳动者
D.
18岁以上的男性劳动者
【简答题】听力原文：Television can be harmful if it is watched constantly. However when it is watched in a moderate way, it is valuable as it provides relaxation, entertainment and education. (54)
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