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【单选题】
我国城市饮用水卫生标准规定A.
每1000ml水中大肠杆菌<3个< /div>
B.
每1000ml水中大肠杆菌<30个< /div>
C.
每100ml水中大肠杆菌<3个< /div>
D.
每100ml水中大肠杆菌<30个< /div>
E.
每500ml水中大肠杆菌<3个< /div>
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举一反三
【单选题】The frog in the well knows nothing of the great ocean.
A.
井中之蛙，对大海一无所知。
B.
坐井观天，孤陋寡闻。
【单选题】What is the main implication of the fable the Frog in the Well?
A.
Narcissism is a source of motivation
B.
Don’t take risks and safety is the top priority
C.
Never compare yourself with others because everyone has his/her strength
D.
It’s no need to be too self-centered
【简答题】阅读理解。 A frog (青蛙) sat in a well. A bird flew down and fell on the wall of the well (井). The frog asked the bird, 'Where are you from?' 'I fly in the sky. I have flown over one hundred Li. I feel thirs...
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