于10月1日18时59分57秒“嫦娥二号”探月卫星在西昌卫星发射中心发射升空.发

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问题:

于10月1日18时59分57秒“嫦娥二号”探月卫星在西昌卫星发射中心发射升空.发射“嫦娥二号”的电视直播中报道,火箭(连同上端的飞船)总高度为58m,发射塔高度约为100m.某同学在观看电视时,默默地记下发射前火箭上端的位置A(如图所示),并用自己的手表测出火箭从开始发射到下端通过A点所用的时间约为4s.假设火箭离开发射塔前是做的是匀加速直线运动,请你根据上述已知条件,试求出:

(1)火箭的加速度大小;

(2)火箭末端通过A处时的速度大小.

考点:匀变速直线运动的位移与时间的关系
题型:问答题

报表中的报表页眉是用来( )。

A.显示报表中的字段名称或对记录的分组名称

B.显示报表的标题、图形或说明性文字

C.显示本页的汇总说明

D.显示整份报表的汇总说明

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—_______ do you prefer, walking or running?
—I like running better.

A. What
B. How
C. When
D. Which
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The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.

These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.

After leaving the Pentagon, MacTaggart could have profited from his connections with defense contractors, but he refused to do so.()

A. After leaving the Pentagon, MacTaggart could have profited from his connections with defense contractors, but he refused to do so.

B. MacTaggart could have profited from his connections with defense contractors after leaving the Pentagon, but he refused to do it.

C. MacTaggart could have profited after leaving the Pentagon from his connections with defense contractors, but he refused to do so.

D. Having left the Pentagon, MacTaggart could have used his connections with defense contractors to profit, but he refused to do it.

E. Refusing to profit from his connections with defense contractors, MacTaggart could have done so after leaving the Pentagon.

题型:问答题

头痛甚剧,伴头晕面红目赤,胁痛口苦,心烦易怒,便秘溲赤,舌边尖红,苔薄黄,脉弦数。治疗选方为

A.天麻钩藤饮

B.川芎茶调散

C.龙胆泻肝汤

D.逍遥散

E.小柴胡汤

题型:问答题

一家4口人,父亲比母亲大3岁,哥哥比弟弟大2岁。四年前他们全家的年龄和为58岁,而现在是73岁。现在各人的年龄是多少( )

A.35,32,4,2
B.34,31,5,3
C.33,30,6,4
D.32,29,7,5

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