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【多选题】
在下列“诚信”的说法中,正确的应该是( )。A.
真实不欺
B.
真心实意地履行诺
C.
“诚”不能没有条件，首先要看对方是否“诚实”
D.
“信”是双方的事，对方不“信”，则自己就不能“信”
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【多选题】The dependent suspension can be divided into the () independent suspension, the () independent suspension and the () independent suspension.
A.
coil spring
B.
diaphragm spring
C.
pneumatic spring
D.
steel plate spring
【单选题】设P:他生病了。Q:他出差了。r:我同意他不参加学习。则命题“如果他生病或出差了,我就同意他不参加学习” 的符号化表示为【 】。
A.
(P∨Q) R
B.
P→Q∨R
C.
(P∨Q)∧R
D.
(P∨Q) ↔R
【单选题】The word hammock in this passage means ______.
A.
a suspension cage which can be swung to and fro in the air
B.
a seat hanging by two ropes from the branch of a tree
C.
a suspension bridge in the South American rain forests
D.
a net hung between two supports and used as a bed
【单选题】设 P :他生病了。 Q :他出差了。 R :我同意他不参加学习。则命题“如果他生病或出差了,我就同意他不参加学习” 的符号化表示为【 】。
A.
(P ∨ Q) ® R
B.
P à Q ∨ R
C.
(P ∨ Q) ∧ R
D.
(P ∨ Q) « R
【单选题】The new suspension bridge __________ by the end oflast month.
A.
． has been designed
B.
． had been designed
C.
． was designed
D.
． would be designed
【单选题】Why are suspension systems used on vehicle?
A.
It must also keep the tires in contact with the road regardless of road surface. A basic suspension system consists of springs, axles, shock absorbers, arms, rods and ball joints.
B.
The purpose of the complete suspension system is to isolate the vehicle body from road shocks and vibrations, which will otherwise be transferred to the passengers and load.
C.
Light commercial vehicles have heavier springs than passenger vehicles and can have coil springs at the front and leaf springs at the rear.
D.
Wheels must be strong enough to support the vehicle and withstand the forces caused by normal operation. At the same time, they must be as light as possible to help keep unsprung weight to a minimum.
【简答题】设 P :他生病了, Q :他出差了, R :我同意他不参加学习。 给出命题 “ 若不是他生病或出差了,我是不会同意他不参加学习。”的符号化形式。
【简答题】(红细胞)悬浮稳定性(suspension stability)
【简答题】设 P :他生病了, Q :他出差了. R :我同意他不参加学习 . 则命题 “如果他生病或出差了,我就同意他不参加学习”符号化的结果为( )。
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