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【单选题】
下列说法不正确的是( )A.
只要一个图存在游，就一定可找到具体的游；
B.
一个图存在游，如果方法不对仍然可能找不到具体的游；
C.
存在环游的图一定可以“一笔画”；
D.
中国邮递员问题实质上就是找出一条权最小的环游，即最优环游。
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反馈参考答案：
举一反三
【简答题】The Ft. George tunnel section was built by skilled miners, but they were poorly paid. ( )
【单选题】The mass of a single iron atom is 9.3 × 10 –23 g. Determine the number if iron atoms in regular cube that measures exactly 10 cm on an edge. The density of iron is 7.86 g/cm 3 ( )
A.
7.5 × 10 24
B.
3.5 × 10 25
C.
8.5 × 10 25
D.
4.2 × 10 26
【单选题】—Can you act out this play in English? —_______ It's too hard. [ ]
A.
Yes, I can sing
B.
No, I can't
C.
No, I don't
D.
Yes, I do
【单选题】Read the following paragraph from the section "Playing For The Camera." Still, Akash was not just here to build his business. He is a skilled speller. Akash won a regional bee over many competitors. O...
A.
how Akash studies for his spelling bees
B.
how Akash started his own business
C.
how Akash and Amrita are good spellers
D.
how Akash and Amrita got to the national spelling bee
【判断题】The Ft. George tunnel section was built by skilled miners, but they were poorly paid.
A.
正确
B.
错误
【单选题】—Can you ________ him studying hard? —No, I can't. He never studies hard. [ ]
A.
stop
B.
prevent
C.
keep
D.
warn
【单选题】I will work as hard as I can _____ for the final exam.
A.
prepare
B.
to prepare
C.
preparing
D.
prepared
【单选题】The skilled section the working class is increasing as a proportion of the workforce.
A.
support
B.
relation
C.
portion
D.
scarcity
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