For each of them there are four choices marked A, B, C and D. You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.
每题都有对应标记的A、B、C和D四个选项，请选择最佳选项并在答题卡2的相应字母中间划横线。
In Section 2, facts A, B, and C are derived, and then used to deduce D.
第二小节中的事实A,B,C被推导出来，并用于证明D。
These include pre- and post-increment/decrement ( i++, --foo ), add/sub/mult/div assign operators ( a+=3, b*=2, c/=2.2, d-=6.2 ).
其中包括前后加/减（i++、--foo）， 加减乘除赋值运算符（a+=3、b*=2、c/=2.2、d-=6.2）。
Five triterpenoids were isolated and their structures were identified to be cauloside C (1), akebiasaponin D (2), akebiasaponin F (3), ursolic acid (4) and hederagenin (5).
分离鉴定了5个三萜类化合物：葳岩仙皂苷C（1）、木通皂苷D（2）、木通皂苷F（3）、 熊果酸（4）和常春藤皂苷元（5）。
A new propulsion concept of 2 D C D vectoring nozzle was proposed, which had a convergent duct shaped by spheric surface and a divergent one with rectangular transverse section.
提出了一种二元收扩矢量喷管的概念，用热射流实验台对二元矢量喷管进行了过膨胀状态下的喷管模型热态实验。
1: Begin the Begin: Ben vanishes after returning to Washington, D. C., in the Season 2 premiere.
第1集：开始：本消失后返回华盛顿特区，在本赛季2首映。
The problem in the old non - reversing speed control system of LS-2 D. C casting machine with rope driving are analyzed and discussed;
对采用钢丝绳传动的LS-2型半连续铸造机的不可逆调速系统存在的问题进行了全面分析；
The power DT1, DT2 power, C port A, D port and exhaust ventilation, compressed air to push the piston rod oil cylinder forward, realize the preloading force state in figure 2;
DT1通电，DT2断电，C气口通气A、D气口排气、压缩空气将油压到油缸内推动活塞杆前移，实现预压出力状态如下图2；
The power DT1, DT2 power, C port A, D port and exhaust ventilation, compressed air to push the piston rod oil cylinder forward, realize the preloading force state in figure 2;
DT1通电，DT2断电，C气口通气A、D气口排气、压缩空气将油压到油缸内推动活塞杆前移，实现预压出力状态如下图2；
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