在高压管路法兰上加的金属垫片，其硬度应比法兰材质的硬度（）。
A、大；
B、小；
C、一样；
D、均可。
参考答案：B
Several years after they got married he ____ chatting on the Internet until very late, which eventually resulted in their divorce.
A．took on
B．came to
C．took to
D．came about
患者，女性，32岁，因弥漫性毒性甲状腺肿（Graves病）医嘱予丙硫氧嘧啶100mgTid口服治疗。用药1周后，患者出现发热、咽痛，此时应首选复查
A．白细胞计数和分类
B．总甲状腺素(TT4)
C．促甲状腺素受体抗体(TRAb)
D．促甲状腺素(TSH)
