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【判断题】
前消声器主要用于调节发动机的功率,后消声器用于真正的消声。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】下列叙述正确的是
A.
同温同压下，相同体积的物质，其物质的量一定相等
B.
等物质的量的甲烷和一氧化碳所含的分子数一定相等
C.
1L一氧化碳气体质量一定比1L氧气的质量小
D.
相同条件下的CO气体和NO气体，若体积相等，则它们的质量一定相等
【单选题】----Why didn’t you apply for the job? ----I ________, but my old friend offered me a better one.
A.
was going to
B.
would
C.
will
D.
am going to
【单选题】- My friend has achieved his goal after years of hard work. - Great! ________.
A.
One tree can't make a forest
B.
Where there is a will, there is a way
C.
Many hands make light work
D.
A friend in need is a friend indeed
【简答题】B. Listen to a talk about sleep. Take notes and complete the following summary. Everyone needs to 1 . It seems that there are 2 purposes of sleep: 3 rest and 4 or 5 rest. We need to rest our 6 and ou...
【单选题】下列叙述正确的是
A.
同温同压下，相同体积的气体，其分子数一定相等，原子数也一定相等
B.
任何条件下，等物质的量的甲烷(CH 4 )和一氧化碳所含的原子数一定相等
C.
同温同压下的二氧化碳气体和氮气，若体积相等，则质量一定相等
D.
同温同压下，1L一氧化碳气体一定比1L氧气的质量小
【单选题】—Do you __________ an American friend? —No, I don’t. But my sister __________ one.
A.
has, has
B.
has, have
C.
have, have
D.
have, has
【单选题】Which of the following does the author NOT agree with?
A.
One shouldn't lend money to friends.
B.
The meaning of life doesn't completely lie in money.
C.
Happiness is not necessarily the result of wealth.
D.
Money is important in modern society.
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