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【单选题】
世界上第一家旅行社托马斯·库克父子公司正式成立于( )年。A.
1845
B.
1851
C.
1838
D.
1865
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【单选题】Duke Ellington's orchestra,______ his own often complex compositions, made many innovations in jazz.
A.
he played
B.
playing
C.
that it played
D.
was playing
【简答题】在气相色谱分析中，为了测定下列组分，宜选用哪种检测器？ ⑴农作物中含氯农药的残留量；⑵酒中水的含量；⑶啤酒中微量硫化物；⑷苯和二甲苯的异构体。
【简答题】为了检测下述组分,采用气相色谱分析时宜选择哪种检测器? (1)作物中含氯农药的残留骰;(2)酒中水的含量;(3)啤酒中微量硫化物;(4)苯和二甲苯中的异构体。
【简答题】The news was made ______ (know) to the public at last.
【简答题】The whole nation was ______ when news came that China's first man-made satellite had been successfully launched．中国第一颗人造卫星发射成功的消息传来时，整个国家都轰动了。
【简答题】在气相色谱分析中,常用到如下检测器:电子捕获检测器;氢火焰离子化检测器;热导检测器;火焰光度检测器。为了测定下面组分,请选合适的检测器: 农作物中含氯农药残留量, ;酒中的水量, ;啤酒中的硫化物, ;蜜饯中的甜蜜素, ___________ 。
【简答题】为了检测下述组分，采用气相色谱分析时宜选择哪种检测器？ （1）作物中含氯农药的残留量， （2）酒中水的含量， （3）啤酒中微量硫化物， （4）苯和二甲苯中的异构体。
【单选题】– I hear that as many as 150 people were killed in the earthquake. – Yes,_____ news came as ______ shock to us.
A.
a; a
B.
the; a
C.
/; /
D.
/; a
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