现代二冲程柴油机换气形式的发展趋势是________。
A. 气口-气口横流
B. 气口-气口弯流
C. 气口-气阀直流
D. 气口-气口回流
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【2009】What a nice day! How about the three of us _____ a walk in the park nearby?
A. to take
B. take
C. taking
D. to be taking
【2014】Please pardon ____________ you.
A. my disturbing
B. disturbing
C. me to disturb
D. that I disturb
【2016】Thisisoneoftheissuesthatdeserve__________.
A. mentioning
B. beingmentioned
C. tomention
D. formention
【2010-13】_____shouldnotbecomeaseriousdisadvantageinlifeandwork.
A. Tobenottall
B. Notbeingtall
C. Beingnottall
D. Nottobetall
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