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【单选题】
船舶免于卫生控制措施证书和船舶卫生控制措施证书的有效期最长应为 ____ 。如果所要求的检查或控制措施不能在港口完成,此期限可延长 ______ 。A.
6 个月、半个月
B.
6 个月、 1 个月
C.
12 个月、 1 个月
D.
12 个月、 3 个月
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举一反三
【单选题】Which of the following statements may be considered an honor to a telephone? ( )
A.
It provides a means for all kinds of talks whereas the speakers needn't come person to person with each other.
B.
It can send a message of sudden emergency conveniently.
C.
It is densely-installed in England.
D.
It is impossible to ignore the telephone when it rings.
【简答题】人造石材的优缺点有哪些?
【单选题】A survey is a study, generally in the form. of an interview or a questionnaire, that provides information concerning how people think and act. In the United States, the best-known surveys are the Gall...
A.
The history of surveys in North America
B.
The principles of conducting surveys
C.
Problems associated with interpreting surveys
D.
The importance of polls in American political life
【单选题】Which of the following statements is not true?______
A.
American society has failed to provide these institutions with adequate resources to meet their needs
B.
Though in difficulty, these institutions are determined to fulfill both research and teaching functions
C.
American society has relied too much on their institutions of higher education to allow them for easy adjustment to all their functions
D.
More resources and efforts of faculty are needed for research work than teaching work
【单选题】C-62001塔正常生产中，中间回流量FIC20001与塔顶回流量FIC20005相比（）。
A.
FIC20001流量大
B.
FIC20005流量大
C.
两者大小相同
【简答题】人造石材一般可为几类？每一类人造石材的主要特性有哪些？
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