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【单选题】
E-R图中用矩形表示实体(等同于表)，用椭圆形表示实体的属性(等同于表中的字段)，用菱形表示实体关系(等同)。A.
FA必须定义在FB之前
B.
FB必须定义在FA之前
C.
若FA定义在FB之后，则FA的原型必须出现在FB的定义之前
D.
若FA定义在FB之后，则FA的原型必须出现在FB的定义之前
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举一反三
【单选题】From the fourth pa ra graph, we get the impress i on that
A.
the author cherished his c hildhood memor i es.
B.
the author spent much time in daydrea m ing.
C.
the author may not have a happy childhood
D.
the author can't remember his ch i ldhood days.
【单选题】What is strongly recommended that we prepare to further impress the client？
A.
something interesting and special
B.
something expensive and valuable
C.
something typical of China or some local specialties
D.
anything
【单选题】— What does Justin Bieber’s song Never Say Never impress you most? — It tells us that we _______ do almost anything if we never give up.
A.
can
B.
have to
C.
should
D.
need
【简答题】A)Ignore B) impact C) improve D) impress 1. Steve borrowed his dad’s sports car to his girlfriend. 2. We need to assess the on climate change. 3. Many wines with age.
【单选题】常压下苯-甲苯体系的平均相对挥发度为2.45,进料液中 =0.4,塔顶馏出液中 =0.95,塔底馏残液含苯为 ≤0.02,试估算全回流所需要的理论塔板数和进料板所在位置(含再沸器)。
A.
6,3
B.
7,4
C.
7,3
D.
6,4
【简答题】Fill in the blanks in the following passage by selecting suitable words below. A) as B)qualities C) confident D) amazed E) idols F) mimic G) constantly H) shared Often when we idoli...
【简答题】Do you think the film is worth ________? A. see B. to see C. seen D. seeing 2. Finally, my sister got a job ________ assistant manager in a bank. A. for B. with C. as D. like 3. It is predicted that t...
【单选题】Your ideas are very interesting, but we need _______ suggestions to get us out of the mess.
A.
impressive
B.
similar
C.
practical
D.
traditional
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