掌握自我防护知识，正确进行各项技术操作，预防锐器刺伤，属于医务人员医院感染管理职责。()
All of the following are true EXCEPT that
A. attention-boosting training can improve focus and concentration at once.
B. financial pressure attracts more Americans to try their luck in gambling.
C. kindergarten is the best place to know about people"s impulsivity.
D. parents often unconsciously encourage kids to gamble.
American writer and cartoonist Frank A. Clark once said: " Criticism, like rain, should be
按照计入指数的项目的个数多少，指数分为总指数和()两种
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