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【单选题】
与洗涤剂有环境激素是什么?()。A.
DDT
B.
双酚A
C.
壬酚
D.
A+B+C
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举一反三
【单选题】Since the recent river pollution in several provinces, people _______ more and more attention to the quality and safety of drinking water.
A.
pay
B.
are paying
C.
have paid
D.
have been paying
【单选题】More and more attention has been drawn to the fact that many children are ________ in the countryside when their parents flood into the cities for jobs.
A.
left off
B.
left aside
C.
left out
D.
left behind
【单选题】According to the text, which of the following is true?
A.
It’s always true that teachers’ quality is important.
B.
Salaries in school are higher than those in other industries.
C.
The average quality of the teachers in America is declining.
D.
Administrators have many effective ways to choose best teachers.
【单选题】In the author's opinion,______.
A.
it is true that life in America is much faster than that in any other city
B.
people living outside big cities are lazy and miserable
C.
most American people enjoy living in the suburbs of big cities
D.
those who are busy are not necessarily unfriendly
【简答题】某设备有 3 台电动机,控制要求如下:按下起动按钮,第一台电动机 M1 起动,运行 5s 后,第二台电动机 M2 起动, M2 运行 10s 后,第三台电动机 M3 起动;按下停止按钮, 3 台电动机全部停止。
【简答题】People ask the Government to pay more attention to______.
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