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【单选题】
道岔转换设备是用于道岔转换、锁闭及对道岔所处位置及状态进行监督的设备，包括转辙机及转换锁闭器、（）、密贴检查器及安装装置等。A.
下拉装置
B.
锁闭装置
C.
外锁闭装置
D.
弯板支撑装置
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【简答题】Liz Murry was only three years old when she _______________ her parents had been _______________, just before Christmas, Liz mother died and her father moved to a _____________________. Her mother's d...
【单选题】题目：输入某年某年某月某日，判断这一天是这一年的第几天？思路：以3月5日为例，应该先把前两个月的加起来，然后再加上5天即本年的第几天，特殊情况，闰年且输入月份大于3时需考虑多加一天：year = int(input('year:\n'))month = int(input('month:\n'))day = int(input('day:\n'))months = [0,31,59,90,120,...
A.
(year % 400 == 0) or ((year % 4 == 0) and (year % 100 != 0))
B.
(year % 400 = 0) or ((year % 4 = 0) and (year % 100 != 0))
C.
(year % 400 == 0) and ((year % 4 == 0) and (year % 100 != 0))
D.
(year % 400 == 0) and ((year % 4 == 0) or (year % 100 != 0))
【单选题】Liz was a student at a British university before she came to the U.S.
A.
True
B.
False
C.
Empty A
D.
Empty B
【简答题】输入一年份(year),判断是闰年还是平年。请写出条件表达式。
【简答题】Liz Murray was only three years old when she realized her parents had been addicted to drugs. In 1996, just before Christmas, Liz ’ s mother died and her father moved to a homeless shelter. Her mother...
【单选题】设a=log 3 4,b=log 2 ,c=2 -0 . 5 ,则a,b,c的大小关系 [ ]
A.
b
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