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【单选题】
有一辆车据反映有怠速不稳定故障,用废气分析仪检查得出在怠速时,出现混合气可能过稀状态,并且 HC 和 O2 排放含量高,加大丙烷的浓度不能改善这种情况。在 2500r / min 时,废气分析仪的读数才有改善。最可能的原因是:A.
在油路中有空气
B.
气缸垫泄漏
C.
进气门导管磨损
D.
凸轮轴凸尖磨损
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反馈参考答案：
举一反三
【判断题】In the 1930s, the United States experienced the Great Depression which first began with the New York stock market crash.()
A.
正确
B.
错误
【单选题】Which of the following is George Bernard Shaw’s first play?
A.
The Quintessence of Ibsenism
B.
The Perfect Wagnerite.
C.
Arms and the Man.
D.
Widower's Houses.
【简答题】Increases in assets are recorded on the ( ) of an account.
【单选题】Which of the following newspapers in the U.S. is the one that first exposed the Watergate Scandal in 1972?
A.
The Washington Post
B.
The Wall Street Journal
C.
The New York Times
D.
The Los Angeles Times
【简答题】Increases in assets are _______________ to asset accounts, increases in liabilities are _______________ to liability accounts.
【单选题】As in business accounting, the balance of payments records increases in assets and decreases in liabilities as __________, and decreases in assets and increases in liabilities as ________.
A.
debit; credit
B.
debit; debit
C.
credit; debit
D.
credit; credit
【单选题】术后5：术后肺不张的最常见的原因是
A.
由于疼痛不敢咳嗽
B.
分泌物积聚，堵塞支气管
C.
应用唛啶抑制呼吸
D.
呼吸恒定于潮气量通气，致功能性气体交换面积丢失
E.
麻醉药物所致
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