李斯在《谏逐客书》中说：“此四君者，皆以客之功，”这“四君”指的是（）。
A. 秦穆公
B. 秦孝公
C. 秦始皇
D. 秦惠王
E. 秦昭王
千斤顶按照其结构形式和工作原理不同，可分为（）式、（）式和（）式千斤顶。
焊（连）接接头在受弯构件的受拉区不得大于（），轴心受拉构件不得大于（）。
Which three conditions can cause BGP n eighbor establishment to fail?（）
A. The IBGP neighbor is not directly connected.
BGP synchronization is enabled in a transit autonomous system with fully - meshed IBGP neighbors.
C. The EBGP neighbor ebgp - multihop option is set to the de fault value.
D. The BGP update interval is different between the two BGP neighbors.
E. The BGP neighbor is referencing an incorrect autonomous system number in its neighbor statement.
F. There is an access list blocking all TCP traffic between the two BGP neighbors.
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