皮皮学，免费搜题
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搜题
【判断题】
求解网络最大流的问题可归结为求解一个线性规划问题A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】There's ______water in the bottle. Don't throw it away.
A.
little
B.
a little
C.
a few
D.
few
【单选题】Don't throw your things everywhere. _____. [ ]
A.
Put it away
B.
Put away them
C.
Put away it
D.
Put them away
【单选题】—It’s _________ useful dictionary and you can’t throw it away . —Thank you . I didn’t know it before .
A.
a
B.
an
C.
the
D.
不填
【简答题】People didn't use to throw things away. They used to mend their clothes and reused them until they wore out. When they bought things, they used to carry shopping baskets. But now we don't reuse things...
【单选题】She did not throw away the stockings until they were so ______ that they couldn't be mended anymore.
A.
wearing off
B.
worn out
C.
wearing out
D.
worn off
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