多项选择题

《朋党论》中列举历史上残害党人的例子有（）。 A. 东汉的党锢之祸 B. 唐昭宗时的诛戮清流 C. 唐朝后期的朋党之争 D. 明末党争

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单项选择题

CAR - CARAVAN ANALOGY
Consider the figure below, which draws the analogy between store-and-forward link transmission and propagation of bits in packet along a link, and cars in a caravan being serviced at a toll booth and then driving along a road to the next tollbooth.

Suppose the caravan has 10 cars, and that the tollbooth services (that is, transmits) a car at a rate of one car per 2 seconds. Once receiving serving a car proceeds to the next tool both, which is 500 kilometers away at a rate of 10 kilometers per second. Also assume that whenever the first car of the caravan arrives at a tollbooth, it must wait at the entrance to the tollbooth until all of the other cars in its caravan have arrived, and lined up behind it before being serviced at the toll booth. (That is, the entire caravan must be stored at the tollbooth before the first car in the caravan can pay its toll and begin driving towards the next tollbooth).
Once a car enters service at the tollbooth, how long does it take until it leaves service?
A、2 s
B、20s
C、18s
D、22s

单项选择题

135.下列有关柑橘“1”字形芽接绑缚环节的说法，正确的是（）。
A、为防止接芽产生挤压伤，绑缚宜松不宜紧
B、为防止伤口失水与氧化，绑缚宜快不宜慢
C、为保证砧穗紧密接触，宜增加薄膜缠绕圈数
D、为保证接芽的有氧呼吸，宜将接芽露在外面