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【判断题】
毛细管法测定熔点时,装入的试样量不能过多,否则结果偏高。试样疏松会使 测定结果偏低。物质中混有杂质时,通常导致熔点下降。( )A.
正确
B.
错误
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举一反三
【单选题】Progress so far has been very good. , we are sure that the project will be completed on time. [ ]
A.
However
B.
Otherwise
C.
Therefore
D.
Besides
【单选题】Everything works out well. ____, we are sure that the experiment will be completed on time.
A.
Therefore
B.
While
C.
However
D.
Otherwise
【单选题】最可能形成z-DNA的序列是( )。
A.
5’-ATATATATATATATATATAT-3’ 3"一TATATATATATATATATATA-5’
B.
5’-AAAAAAAAAAAAAAAAAAAA-3’ 3"-TTTTTTTTTTTTTTTTTTTT-5’
C.
5’-GCGCG(2GCGCGCCGCGCGCG一3’ 3"-CGCGCGCGCGCGCGCGCGCG-5’
D.
5’-GGGGGGGGGGGGGGGGGGGG一3’ 3"-CCCCCCCCCCCCCCCCCCCCC一5’
【简答题】法国哲学家帕斯卡说，“人只不过是一根芦苇，是自然界最脆弱的东酉，但他是一根能思想的芦苇．用不着整个宇宙都拿起武器才能毁灭他，一口气、一滴水就足以致他死命了．然而，纵使宇宙毁灭了他，人却依然要比致他于死命的东西高贵得多；因为他知道自己要死亡，以及宇宙对他所具有的优势，而宇宙对此却是一无所知。因而我们全部的尊严就在于思想．”中国哲学家冯友兰说：“宇宙间若没有鸟璃蜂蚁，不过是投有玛和蜂蚊．但宇宙间苦没有...
【单选题】Progress （ ） so far very good and we are sure that the work will be finished on time.
A.
was
B.
had been
C.
has been
D.
will be
【单选题】—Have you found out anything, sir? —We are sure that the thief entered the house through the window instead of breaking in. You have closed the window before you left.
A.
shouldn’t
B.
must
C.
couldn’t
D.
might
【单选题】Progress so far has been very good. ______ , we are sure that the project will he completed on time.
A.
However
B.
Otherwise
C.
Therefore
D.
Besides
【简答题】aaaaaaaaaaaaaaaaaaaa从键盘上输入数据的代码如下:(请注意大小写) Scannersc=new Scanner( ); System.out.print("输入提示信息:"); intn=sc. ();//输入一个整数 double d=sc. ();//输入一个小数 String s=sc. ();// 输入一个字符串
【单选题】最可能形成Z-DNA的序列是：
A.
ATATATATATATATATATAT
B.
AAAAAAAAAAAAAAAAAAAA
C.
GCGCGCGCGCGCCGCGCGCG
D.
GGGGGGGGGGGGGGGGGGGG
E.
GTGTGTGTGTGTGTGTGTGT
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