在职攻硕英语考试

解析：Directions: There are 10 blanks i

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【单选题】
Directions: There are 10 blanks in the following passage. For each numbered blank, there are 4 choices markedA,B,C、andD、

The key to the industrialization of space is the U.S. space shuttle. {{U}} (51) {{/U}} it, astronauts will acquire a workhouse vehicle {{U}} (52) {{/U}} of flying into space and returning many times. {{U}} (53) {{/U}} by reusable rockets that can lift a load of 65 000 pounds, the shuttle will carry devices for scientific inquiry, as well as a variety of military hardware. {{U}} (54) {{/U}} more significantly, it will deliver materials and machines into space for industrial purposes {{U}} (55) {{/U}} two decades ago when "sputnik" (artificial satellite) was added to the vocabulary. In short, the {{U}} (56) {{/U}} importance of the shuttle lies in its promise as an economic tool.
What makes the space shuttle {{U}} (57) {{/U}} is that it takes off like a rocket but lands like an air plane. {{U}} (58) {{/U}} when it has accomplished its mission, it can be ready for {{U}} (59) {{/U}} trip in about two weeks.
The space shuttle, the world’s first true spaceship, is a magnificent step {{U}} (60) {{/U}} making the impossible possible for the benefit and survival of man.
A．Then
B．Or
C．But
D．So

网考网参考答案：C
网考网解析：
上句讲航天飞机在军事和科研方面的重要性，本句指出它的作用在工业方面却更为重要，所以要用连词But表示转折递进的关系。Then“然后，之后”多用来表示时间上的顺序。Or“或者；否则”一般表示选择，且很少放在句首。So一般引导表示结果的句子，这里没有因果关系，故在这里也不合适。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>

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