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【判断题】
在自动变速器换挡时,ECU 可通过换挡控制电磁阀调节行星齿轮系统执行机构的工作压力,使执行元件柔和地接合,进一步提高换挡品质。( )(II)
A.
正确
B.
错误
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【单选题】气蚀是下列哪种 输送设备特有的现象
A.
压缩机
B.
真空泵
C.
离心泵
D.
往复泵
【单选题】一般开式齿轮传动的主要失效形式是
A.
.轮齿疲劳折断
B.
.齿面磨损
C.
.齿面疲劳点蚀
D.
.齿面胶合
【单选题】______you told me______true?
A.
Is what /
B.
What /
C.
That is
D.
What about is
【单选题】气蚀是下列( )输送设备特有的现象。
A.
压缩机
B.
真空泵
C.
离心泵法启动
D.
往复泵
E.
齿轮泵
【单选题】A murder would most likely occur ______.
A.
on a weekend night in summer
B.
on a weekend afternoon in summer
C.
on a weekend night in winter
D.
on a weekend afternoon in spring
【单选题】What is true about the rational gate and emotional gate?
A.
The emotional gate is all about trust, love, identification and benefits.
B.
The rational gate examines the advantages, belief and features, and seeks value for money.
C.
The emotional gate is all about trust, love, identification and belief.
【单选题】有界函数与无穷小的乘积是()
A.
无穷小
B.
无穷大
C.
0
D.
1
【单选题】'What did you do _____?'    'I visited my uncle.' [     ]
A.
over the weekend
B.
for the weekend
C.
on weekend
D.
at the weekend
【判断题】有界函数与无穷小的乘积是无穷大
A.
正确
B.
错误
【单选题】--- How was your weekend ?   --- ___________________
A.
I’d like to visit my uncle for this weekend.
B.
It was good.
C.
Did you have a nice weekend ?
D.
I used to spend my weekend in the country
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