关于甲状旁腺的方法正确的是
A. 通常为一对扁椭圆形小体
B. 贴附于甲状腺侧叶后面
C. 约黄豆大小，呈淡红色
D. 幼儿时期体积较小
E. 功能亢进时常引起血钙下降
in America, employer can just fire you without good reason regardless of legal protections.
A. 对
B. 错
Which statements about coffee break are ture?
A. Nearly all offices have mid-morning and mid-afternoon coffee breaks.
B. 15 minutes are allowed twice a day for relaxation and chatter.
C. many employees take coffee to their desks and keep on working
D. Some employees do some physical exercises during the coffee break.
Which statements about people working in American offices are ture?
A. The official work day starts at ten past nine.
B. They may find other work if their own desks are clear.
C. They may help someone else with his or her work.
D. They may sit idle, or do nothing.
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