[单选] Which statement is true？（）

A . An IPv6 address is 64 b long and is represented as hexadecimal characters.
B . An IPv6 address is 32 b long and is represented as decimal digits.
C . An IPv6 address is 128 b long and is represented as decimal digits.
D . An IPv6 address is 128 b long and is represented as hexadecimal character

新生入园时哭闹应怎么做？由检验人员通过感官掌握零件的损伤情况，并根据经验判断零件是否可用的方法叫（）法。测量。检视。探伤。磁力。确定土层锚杆承载力的试验项目包括（）。 ①抗拉试验； ②抗拔试验； ③抗弯试验； ④验收试验 ④③②。 ①②③。 ②③④。 ①②④。螺纹套筒连接技术的缺点之一是自锁性较差蓟马的口器是（）咀嚼式。刺吸式。虹吸式。锉吸式。 Which statement is true？（）

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[单选] Which statement is true？（）

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